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Wyszukujesz frazę "81.70.BT" wg kryterium: Temat


Tytuł:
An Investigation of Microstructure and Mechanical Properties of Sn-9Zn-xCr Alloys Produced by Investment Casting Method
Autorzy:
Yavuzer, B.
Ozyurek, D.
Powiązania:
https://bibliotekanauki.pl/articles/1032537.pdf
Data publikacji:
2017-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.70.Bt
Opis:
In this study, the microstructure and mechanical properties were investigated of different amount Cr (0.1%, 0.5%, 0.9%) added Sn-9Zn eutectic alloys and Weibull statistical analyses were evaluated using ultimate tensile strength. Pure elements (Sn, Zn, Cr) were used for production of alloys and pre-alloying was done and waited in the electrical resistance furnace at 450°C for 1 h to homogenized and poured as ingot in plaster moulds. Then pre-alloyed Sn-9Zn-xCr ingots were melted and poured at 300°C in ceramic moulds prepared investment casting method. As a result of the study, the highest hardness and ultimate tensile strength values were measured in the Sn-9Zn alloy with 0.1% Cr. It was determined that while ultimate tensile strength was decreased, percentage of elongation was increased by increase of Cr amount. According to the Weibull statistical analyses results, the highest Weibull module was calculated by Sn-9Zn-0.1Cr alloy ultimate tensile strength values.
Źródło:
Acta Physica Polonica A; 2017, 131, 1; 102-105
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mechanical Properties of $Zn-Ni-SiO_2$ Coating Deposited under X-ray Irradiation
Autorzy:
Poliak, N.
Anishchik, V.
Valko, N.
Karwat, C.
Kozak, C.
Opielak, M.
Powiązania:
https://bibliotekanauki.pl/articles/1378243.pdf
Data publikacji:
2014-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.70.Bt
Opis:
Using X-ray microanalysis and scanning electron microscopy $Zn-Ni-SiO_2$ plating containing $SiO_2$ nanoparticles were studied. It was found that X-ray irradiation of the electrolyte leads to the increased Ni concentration in $Zn-Ni-SiO_2(X)$ films and the grain size is also increasing (the grain size is twice that in the unirradiated case). A thickness of $Zn-Ni-SiO_2(X)$ plating is 20 μm and a thickness of the $Zn-Ni-SiO_2$ plating is about 15 μm. The surface morphology was studied using AFM method. Increasing Ni concentration and $Ni_5Zn_{21}$ phase due to X-Ray irradiation of the electrolyte leading to the improved mechanical properties of the coating.
Źródło:
Acta Physica Polonica A; 2014, 125, 6; 1415-1417
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of Tensile Properties of Aluminum 6082-T6 Alloys Joined by Cold Metal Transfer Method by Using Different Working Time
Autorzy:
Ozsarac, U.
Işik, Ş.
Varol, F.
Emin Unat, M.
Özdemir, C.
Aslanlar, S.
Powiązania:
https://bibliotekanauki.pl/articles/1031098.pdf
Data publikacji:
2017-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.20.VJ
81.70.BT
Opis:
In this study, Aluminium 6082-T6 plates having 1.0 mm thickness were joined by magnesium-based (AlMg5) wire in cold metal transfer technique. The specimens were prepared in butt joint form. Argon was used as shielding gas and joining operations were done at gas flow speed of 13 l/min. The joining operations were carried out during four different working times of 25, 30, 35, 40 and 45 seconds. Tensile properties of joints were determined and macro-structures of joints were investigated in order to evaluate the joinability of Aluminium 6082-T6 alloy by cold metal transfer technique. Finally, the micro-hardness values of specimens were measured.
Źródło:
Acta Physica Polonica A; 2017, 132, 3; 705-707
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mechanical properties of chopped carbon fiber reinforced epoxy composites
Autorzy:
Ozsoy, N
Ozsoy, M.
Mimaroglu, A.
Powiązania:
https://bibliotekanauki.pl/articles/1070471.pdf
Data publikacji:
2016-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.05.Qk
81.70.Bt
Opis:
An experimental study has been carried out to investigate tensile, bending, impact and hardness properties of chopped carbon fiber reinforced epoxy composites. Four different weight fractions (0%, 6%, 8%, 10%) were added as reinforcement to composites. The samples were manufactured by using a special designed mold. Tests were carried out according to the ASTM standards. Results of the tests have shown that hardness increases with the increasing amount of carbon fiber in composites. Tensile, bending and impact performances have increased up to 8% of carbon fiber in the composite and then started to decrease.
Źródło:
Acta Physica Polonica A; 2016, 130, 1; 297-299
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of Mechanical Behaviour of Carbon and Glass Fiber Reinforced Epoxy Composites
Autorzy:
Ozsoy, N.
Mimaroğlu, A.
Ozsoy, M.
Powiązania:
https://bibliotekanauki.pl/articles/1401276.pdf
Data publikacji:
2015-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.05.Qk
81.70.Bt
Opis:
An experimental study has been carried out to investigate tensile and bending properties of carbon fiber (CFRE) and glass fiber-reinforced (GFRE) epoxy composites. Three different fiber orientations were applied, 0°, 90° and [0°, 90°]. The laminates were obtained by manual lay-up process. The samples were evaluated by tensile tests according to the ASTM D3039 and bending tests according to the ASTM D790. Experimental results showed that maximum tensile strengths were observed at 0° fiber direction for the both CFRE and GFRE composites. With respect to their tension properties, the CFRE samples had better performance than the GFRE samples, except for the 90° orientation. Three point bending tests proved that in all orientations CFRE composites had better performance, compared to GFRE composites.
Źródło:
Acta Physica Polonica A; 2015, 127, 4; 1032-1034
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of the Fatigue Behavior of a Wheel Rim Using Finite Element Analysis
Autorzy:
Esener, E.
Ercan, S.
Firat, M.
Powiązania:
https://bibliotekanauki.pl/articles/1031128.pdf
Data publikacji:
2017-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
87.10.Kn
81.70.Bt
Opis:
Automobile wheel rims are critical elements that work under fatigue loading. For this reason, it is very important to determine fatigue damage of the wheel rims. Today, finite element analysis is used to make accurate predictions. In this study, it is aimed to determine Chaboche damage model parameters for an aluminium alloy wheel rim. Msc Marc software is used for finite element analysis. First, Chaboche damage model parameters are obtained using simple Holloman equation for finite element analysis. Model parameters are validated by single element tests. Then, fatigue behaviour of an automobile wheel rim is analysed with verified Chaboche parameters. At last, critical areas under fatigue loading are identified on the wheel rim.
Źródło:
Acta Physica Polonica A; 2017, 132, 3; 617-619
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dynamic Behavior of a Clayey Sand Reinforced with Polypropylene Fiber
Autorzy:
Bozyigit, I.
Tanrinian, N.
Karakan, E.
Sezer, A.
Erdoğan, D.
Altun, S.
Powiązania:
https://bibliotekanauki.pl/articles/1031269.pdf
Data publikacji:
2017-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.70.Bt
83.80.Fg
Opis:
It is a well-identified fact that more elaborate laboratory studies should be carried out for evaluation of dynamic properties of different types of soils. Regardless of the mechanisms affecting the mechanical behaviour of the soils, past studies reveal that existence of fiber positively affects the strength of either cohesive or non-cohesive soils. A short literature survey provides numerous studies on the stress-strain behaviour of fine/coarse soils, reinforced by polypropylene fiber. On the other hand, studies concerning fiber reinforced soils subjected to dynamic loading are relatively rare. Therefore, in this research it was intended to investigate the effects of polypropylene fiber inclusion on the dynamic behavior of a clayey sand soil, within an experimental framework. In this scope, a number of cyclic triaxial compression tests were conducted to assess the effect of fiber presence. The effects of fiber length and content were experimentally evaluated. Hence, the variation of shear modulus ratio and damping ratio values by shear deformation was plotted to observe the effects of fiber length and inclusion level as well. The results are presented along with detailed evaluations.
Źródło:
Acta Physica Polonica A; 2017, 132, 3; 674-678
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Computer Aided Structral Analysis of a Tie Rod End
Autorzy:
Ozsoy, M.
Pehlivan, M.
Powiązania:
https://bibliotekanauki.pl/articles/1402528.pdf
Data publikacji:
2015-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.70.Bt
87.10.Kn
Opis:
The tie rod end is one of the most elementary parts of a steering mechanism, which has direct and crucial importance in terms of driving safety. The main function of this part is to transfer the routing, coming from the steering linkage, to steering knuckle via tie rot arm. In this study the structural analysis of a tie rod end part for a van-type vehicle is carried out by finite element (FE) modeling of the body, the joint and the bearing. Hence, unlike the previous studies in literature, each component of the tie rod end is included in FE model and a complete assembly is analyzed by means of contact interactions between parts. The analyses for the joint assembly are carried out for different possible tie-end orientations, and by this modeling approach, the stress variations and deformation characteristics of each component are investigated for different operational loading conditions.
Źródło:
Acta Physica Polonica A; 2015, 128, 2B; B-488-B-490
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mechanical and Thermal Properties of Pumice Powder Filled PPS Composites
Autorzy:
Sahin, A.
Yildiran, Y.
Avcu, E.
Fidan, S.
Sinmazcelik, T.
Powiązania:
https://bibliotekanauki.pl/articles/1182862.pdf
Data publikacji:
2014-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.05.Qk
81.70.Bt
81.70.Pg
Opis:
Recently, it is common application to use particle materials as fillers to improve engineering properties and lower the cost of finished product. Pumice powder is cheaper than most of traditional particle fillers, however use of pumice powders as a reinforcing material in composites has not been studied in literature. Hence, in this study we have investigated the mechanical and the thermal properties of pumice powder filled polyphenylenesulphide (PPS) composites. PPS composites were reinforced with pumice powder at different loading rates (0, 1, 3.5, and 10 wt%) and they were manufactured by twin screw extruder and injection molding machine. Thermal properties were investigated by thermogravimetric analysis and differential scanning calorimeter methods. Moreover, mechanical properties such as barcol hardness, tensile strength, and modulus of samples were investigated. Thermal properties of composite samples have varied significantly depending on the loading rate. Also mechanical properties of pumice powder filled PPS composites have showed better results than pure PPS. According to test results both of mechanical and thermal properties of composites have improved with pumice powder reinforcement and it is determined that pumice powders can be used instead of traditional particle fillers.
Źródło:
Acta Physica Polonica A; 2014, 125, 2; 518-520
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A New Perspective on Cyclic Loading Behavior Analysis of ATSP-Adjustable Telescopic Steel Prop S235GT Material Used in Structural Engineering
Autorzy:
Karaçalı, Ö.
Powiązania:
https://bibliotekanauki.pl/articles/1186479.pdf
Data publikacji:
2016-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.70.-q
81.70.Bt
87.10.Kn
Opis:
In the fatigue life assessment of adjustable telescopic steel prop joints subjected to cyclic loading is critical for determining the number of cycles before fatigue failure of 235GT steel materials. The research aims in this reported work were to develop a computational material model and 3D finite-element analysis model to accurately predict the static and dynamic cyclic load-deformation characteristics of 235GT steel and adjustable telescopic steel prop components. Critical values for stress components, responsible for distinctive fatigue failure of the adjustable telescopic steel prop were obtained and the fatigue limits were illustrated in the Smith diagram. To achieve these, finite element analysis were employed to calculate compressive stresses and equivalent Von Mises stresses as well as the analysis by the strength of materials experimental procedure in laboratory conditions. Hence, through appropriate computer software, the fatigue strength of adjustable telescopic steel prop was automatically determined and expressed in the form of the Smith diagram. The results obtained by the finite-element analysis and calculations are entirely similar to that of strength of materials procedure. This research helps improving site safety to understand the current working load limit basis for the material design of adjustable telescopic steel prop structures and make this design risk-consistent to prevent fatal injuries in the building construction industry.
Źródło:
Acta Physica Polonica A; 2016, 129, 4; 436-438
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Double Stage Nitriding on 34CrAlNi7-10 Nitriding Steel
Autorzy:
Altinsoy, İ.
Çelebı Efe, G.
Yener, T.
Önder, K.
Bindal, C.
Powiązania:
https://bibliotekanauki.pl/articles/1031228.pdf
Data publikacji:
2017-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.05.BX
81.65.LP
81.70.BT
Opis:
In this study, effect of double stage gas nitriding of 34CrAlNi7-10 steel was analyzed. Nitriding processes were carried out in two stages. in the first stage, samples were nitridied at 500°C for 10 h and then in second stage nitriding process was continued at 530 and 550°C for 20 h. During both stages, the nitrogen activity on surface was controlled by the nitriding potential, which is a thermodynamical control parameter for controlled gas nitriding process. The nitriding potential was kept constant, at value of 10, during the first stage and was varied in the range of 3.2-0.2, for both nitriding temperatures, in the second stage. The presence of nitrides, formed on the surface of test materials was determined by XRD analysis technique. The morphology of nitrided layer was studied by optical microscopy. The microhardness of the surfaces of nitrided samples in HV1 was between 955 and 1029. The measurements have shown that the thickness of the compound layer (white layer) has varied between 6.85-23.90 μm and that the growth of the white layer and microhardness gradient were strongly affected by the nitriding potential and the temperature. Diffusion depths as Nht(HV) for Vickers Hardness were determined and compared.
Źródło:
Acta Physica Polonica A; 2017, 132, 3; 663-666
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimization of the inter-operation annealing of cold-drawn eutectoid steels
Autorzy:
Grygier, D.
Rutkowska-Gorczyca, M.
Żak, A.
Jasiński, R.
Powiązania:
https://bibliotekanauki.pl/articles/1075902.pdf
Data publikacji:
2016-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.05.Bx
81.40.Ef
81.70.Bt
Opis:
The test of the results presented in this paper has demonstrated that the most suitable recrystallizing annealing temperature for cold drawn eutectoid steels is 700°C. The microscopic examinations, with the use of scanning electron microscopy and transmission electron microscopy and the results of mechanical properties tests have shown that only at this temperature it is possible to obtain the fully recrystallized homogeneous fine-grained structure of the pearlitic steel.
Źródło:
Acta Physica Polonica A; 2016, 130, 4; 931-934
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Current Intensity and Heat Input in MIG-Brazed Joints of DP 600 Thin Zinc Coated Steel Plates
Autorzy:
Varol, F.
Ozsarac, U.
Aslanlar, S.
Onat, A.
Ekici, M.
Ferik, E.
Powiązania:
https://bibliotekanauki.pl/articles/1193848.pdf
Data publikacji:
2015-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.20.Vj
81.70.Bt
81.05.Bx
Opis:
In this study, DP 600 (Dual-Phase) steel plates having 1 mm thickness were joined by copper-based CuAl8 wire in gas metal arc brazing technique. Specimens were prepared as butt joint. Brazing operations were done with ten different arc voltages and weld currents as 40, 45, 50, 55, 60, 65, 70, 75, 80 and 85 A. Tensile strength, bending force, microstructure of brazed materials, and their microhardness distribution throughout joining were determined. In macro and microstructure examinations, stereo optical microscope, scanning electron microscope (SEM) and energy dispersive spectroscopy were used. This study investigated the effects of current intensity on microstructure and microhardness distribution of transition zone between DP 600 steel and MIG-brazed joint. The tensile strength and bending resistance increase with increasing current intensity.
Źródło:
Acta Physica Polonica A; 2015, 127, 4; 968-971
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Olivine Particle Reinforced Polyphenylene Sulfide Matrix Composites
Autorzy:
Sahin, A.
Sinmazcelik, T.
Powiązania:
https://bibliotekanauki.pl/articles/1031954.pdf
Data publikacji:
2017-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.05.Qk
81.05.Zx
81.70.Bt
Opis:
Polyphenylene sulfide is a semicrystalline thermoplastic polymer. It offers an excellent balance of properties, including chemical resistance, high temperature resistance, dimensional stability, electrical characteristics and flowability. Polyphenylene sulfide must be filled with reinforced agents, such as fibers and fillers, to overcome its inherent brittleness. Because of its low viscosity, polyphenylene sulfide can be molded with high loading of fillers and reinforcements. These fillers and reinforcements will make a difference in the electrical properties, strength, dimensional stability, surface properties and overall cost. Because of its inherent flame retardancy, polyphenylene sulfide is ideal for high temperature electrical applications. On the other hand, olivine is volcanic based mineral with porous structure, which consists of forsterite (Mg₂SiO₄) and fayalite (Fe₂SiO₄). Both, its lower price compared to other minerals and harmlessness to human health increase the usage of olivine from day to day. For this reason olivine reinforced polyphenylene sulfide composite samples were manufactured at various weight ratios (0, 1, 3, 5 and 10 wt.%). Mechanical and scratch properties of samples were investigated and according to test results, it is concluded that olivine mineral can be used as a reinforcing agent material instead of other conventional fillers.
Źródło:
Acta Physica Polonica A; 2017, 131, 3; 481-483
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of Mechanical Properties of MIG-Brazed TRIP 800 Steel Joints Using Different Working Angles
Autorzy:
Varol, F.
Ekici, M.
Ferik, E.
Ozsarac, U.
Aslanlar, S.
Powiązania:
https://bibliotekanauki.pl/articles/1401225.pdf
Data publikacji:
2015-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.20.Vj
81.70.Bt
81.05.Bx
Opis:
In this study, TRIP 800 (Transformation Induced Plasticity) steel plates, 1.5 mm in thickness, were joined with copper-based (CuAl8) wire by the gas metal arc brazing technique. Specimens were prepared in butt joint form. Five different working angles 50° , 60° , 70° , 80° and 90° were selected for brazing operations. A copper based CuAl8 wire was used as the filler metal. After the metal inert gas brazing process, butt joined specimens were exposed to tensile test in order to characterize the mechanical properties. The microstructure of the joints was investigated by scanning electron microscope (SEM) and optical microscope to see the joinability of TRIP 800 steel by gas metal arc brazing technique.
Źródło:
Acta Physica Polonica A; 2015, 127, 4; 965-967
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermo-Mechanical Properties of an NiTi-Shape Memory Alloy after Dynamic Loading
Autorzy:
Grigorieva, V.
Danilov, A.
Razov, A.
Powiązania:
https://bibliotekanauki.pl/articles/1402089.pdf
Data publikacji:
2015-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
62.20.fg
81.30.Kf
81.70.Bt
Opis:
The results of the comparative study of a quasi-equilibrium NiTi alloy's thermo-mechanical response to high-rate and quasi-static straining in the temperature range of 100-300°C, which included the $A_{f}$ and the $M_{d}$ temperatures, are considered. The existence of B2 → B19' and B2 → R → B19' martensitic transformations, associated with the heterogeneous distribution of Ni₄Ti₃ precipitates is shown to result in shaping of martensitic and austenitic two-way shape memories, the simultaneous presence of which determines the reversing shape memory effect. The suppression of stress-induced B2 → B19' transformation at temperatures higher than the $M_{d}$ temperature resulted in austenitic two-way shape memory only. Distinct dependences on the temperature of the critical stresses that initiate B2 → B19' and B2 → R → B19' martensitic transformations in austenite are shown to be the reason for the participation of the irreversible mechanisms of straining at the earliest stages of tension, whatever the strain-rate applied, thus annihilating the distinctions between the quasi-static and high-rate straining processes. As a result, the thermo-mechanical properties acquired after tension become practically independent of the strain-rate.
Źródło:
Acta Physica Polonica A; 2015, 128, 4; 592-596
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Computational Engineering Analysis of Low-Cycle Loading for AMF-Active Micro Forceps 316 L-Stainless Steel Material by Finite Element Method
Autorzy:
Karaçalı, Ö.
Powiązania:
https://bibliotekanauki.pl/articles/1402434.pdf
Data publikacji:
2015-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.70.-q
81.70.Bt
02.70.-c
02.70.Dh
Opis:
Antagonistic contact on tips of active micro forceps produces surface stresses leading to fracture and wear finally leading to fatal failure. It was the aim of the present research to study the outcome of low cycle loading testing parts of active micro forceps materials involving either surface contact fatigue or flexural loading mechanisms. For this purpose, this research was focused on the mechanisms of the fatigue life of 316 L-type stainless steel active micro forceps in low cycle loading conditions. This could result in the fatigue failure of active micro forceps at stress levels below the yielding stress of material. Thus, researching the material and mechanical behaviors of an active micro forceps structure and force mechanism under low cycle loading is vital. Finite element method with accurate geometry and material properties was employed for a biocompatible forceps' tips in the computational modeling. To justify the data collected from Von Mises' yield condition, the Haigh diagram was developed to analyze fatigue wear. The low cycle loading behavior of the active micro forceps was analyzed in computational engineering tool of ANSYS LS-DYNA under operational load conditions in vitrectomy. The results of the analysis obtained from this research are helpful for micro component manufacturer and clinic surgery operation.
Źródło:
Acta Physica Polonica A; 2015, 128, 2B; B-40-B-42
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design of Self Compacting Lightweight Concrete Using Acidic Pumice with Different Powder Materials
Autorzy:
Bozkurt, N.
Taşkin, V.
Powiązania:
https://bibliotekanauki.pl/articles/1031197.pdf
Data publikacji:
2017-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
62.20.-x
81.70.Bt
89.20.Kk
Opis:
This paper reports an experimental study on the design of self-compacting lightweight concrete using acidic pumice with different powder materials. For this aim, nine self-compacting lightweight concretes were designed with inclusion of two different fine aggregates and different powder materials. This way, two groups of concrete were designed. First group was composed of single type of aggregate which is acidic pumice from Bitlis Region with barite powder, fly ash powder and pumice powder inclusion, while the second group was generated with river sand as a fine aggregate and acidic pumice from Bitlis Region, as a coarse aggregate with the same powder addition. In the design process, slump-flow, V-funnel and L-box tests were applied to determine the fresh properties of self-compacting lightweight concrete. After the design, test of compressive strength, which is one of the most important parameters of concrete, was applied to all self-compacting lightweight concretes in early age. Moreover, ultrasound pulse velocity test was also performed on all concrete series at the same ages.
Źródło:
Acta Physica Polonica A; 2017, 132, 3; 779-782
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Explicit Analysis of Cyclic Fatigue Behavior of Poplar Wood Pallet by Computational Engineering - Von Mises Yield, Goodmen and N-S Diagram Approach
Autorzy:
Karaçali, Ö.
Powiązania:
https://bibliotekanauki.pl/articles/1033516.pdf
Data publikacji:
2017-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
87.10.KN
83.80.MC
81.70.BT
Opis:
Wood pallets are important carrying tools, defined in packaging engineering, for fragile or any kind of heavy goods. Wood pallets are exposed to flexural forces resulting in fracture and fatigue during transportation. In this research, the fracture and fatigue behavior of wood pallet system under loading was investigated, taking into account nail and pallet material behavior, using strain-stress distribution by computational finite element analysis. Static and dynamic numerical analysis was performed on the 3D model of poplar wood pallet using ANSYS computational system. To validate the data gathered from Von Mises yield, Goodman and N-S fatigue diagrams were established to predict fatigue life. The finite element models built in this research may assist the design engineers and manufacturers in evaluation of new design strategies of poplar wood pallets.
Źródło:
Acta Physica Polonica A; 2017, 131, 3; 457-459
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Recycling of Pure Magnesium Chips by Cold Press and Hot Extrusion Processes
Autorzy:
Mindivan, H.
Taskin, N.
Kayali, E.
Powiązania:
https://bibliotekanauki.pl/articles/1195254.pdf
Data publikacji:
2014-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
72.15.Eb
81.70.Bt
82.45.Bb
Opis:
This study aims to recycle pure magnesium chips by a two-stage mechanical processing method. In the present study, the feasibility of recycling pure magnesium chips with the help of commercially pure magnesium powder was investigated. For this study, the magnesium chips mixed with different amount of magnesium powders in the range of 25-75 wt%, after mixing by hand and cold press, are subjected to hot extrusion to provide homogeneous microstructure. Furthermore, the effect of magnesium powder and their amounts on the mechanical properties and corrosion behaviour of the recycled magnesium alloys were studied. The results of the mechanical and corrosion test showed that the hardness and compressive yield strength decreased with increasing chip content, while increase in the chip weight fraction in the initial mixture resulted in a significant increase of corrosion resistance.
Źródło:
Acta Physica Polonica A; 2014, 125, 2; 429-431
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Study of the Dynamic Anterior Cervical Plate Implant by Computer Aided Virtual Engineering Method
Autorzy:
Karaçali, Ö.
Powiązania:
https://bibliotekanauki.pl/articles/1031956.pdf
Data publikacji:
2017-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
87.10.Kn
81.70.Bt
87.15.La
Opis:
The convenience of dynamic anterior cervical PMMA biomaterial placement of spinal implants is considered by finite element modeling. The maximum fatigue behavior was also studied in surface coated Ti-5Al-2.55n spinal screw-rods. Anterior cervical biomaterial plates reduce the hazard for spinal cord injury and provide outstanding fixation for the anterior column, to stop the relocation and slackening of screws-rods by a cross-split screw crown that may be fastened into the biomaterial plate. This article reports about the hollow Ti-5Al-2.55n screw and cervical biomaterial PMMA plate system. The flexion movement of the spine implant was modeled to control the stresses and strains of the bone and screw interfaces under the external forces, as well as motion of the vertebrae by finite element modeling. This computational engineering analysis is aimed to support patients suffering anterior cervical arthrodesis after degenerative disease or trauma. The data from this research may provide an essential base to estimate the stabilization quality. A model for the biomaterial between C4 and C6 segments of vertebrae of cervical spine was obtained. Study of the cervical biomaterial implant provides instantaneous secure fixation virtual experiment with minimal complications, before the real implant surgery, using computer aided virtual engineering.
Źródło:
Acta Physica Polonica A; 2017, 131, 3; 584-587
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Parametric and Structural Analysis of Dynamic Anterior Cervical Biomaterial Plate Implant by Computer Aided Virtual Engineering
Autorzy:
Karaçali, Ö.
Powiązania:
https://bibliotekanauki.pl/articles/1032042.pdf
Data publikacji:
2017-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
87.10.Kn
81.70.Bt
87.15.La
Opis:
The main objective of this study was to examine the convenience of an accurate model of placement of dynamic anterior cervical plate, made of poly (methl-methacrylate) biomaterial, for testing spinal implants, and to determine the maximum fatigue values of differently surfaced Ti-5Al-2.55n spinal screw-rods, by finite element modeling. Anterior cervical biomaterial plates reduce the hazard for spinal cord injury and provide outstanding fixation for the anterior column to stop the relocation and slackening of screws-rods, using a cross-split screw crown that may be fastened into the biomaterial plate. This article reports about the hollow Ti-5Al-2.55n screw and cervical biomaterial plate system. The flexion movement of the spine implant was modeled, using finite elements method, to control the stresses and strains of the bone and screw interfaces to external forces, as well as motion of the vertebras. This computational engineering analysis was aimed to support patients suffering anterior cervical arthrodesis after a degenerative disease or trauma. The obtained data from this research may provide an essential base to estimate the stabilization quality and mechanical properties of biomaterial selection. Model of the region between C4 and C6 segments of vertebrae of cervical spine was produced to correct the stabilization of implant with non-linear material properties. Study of the cervical biomaterial implant has provided instantaneous virtual experiment of secure fixation with minimal complications before a real implant surgery, using computer aided virtual engineering.
Źródło:
Acta Physica Polonica A; 2017, 131, 3; 588-591
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Prediction of Impact Resistance Properties of Concrete Using Radial Basis Function Networks
Autorzy:
Yazici, S.
Inan Sezer, G.
Sezer, A.
Powiązania:
https://bibliotekanauki.pl/articles/1031254.pdf
Data publikacji:
2017-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.70.Bt
79.20.Ap
07.05.Mh
Opis:
This study presents an investigation of the prediction of impact resistance of steel-fiber-reinforced concrete and ordinary concrete specimens. In the experimental part of this study, parameters identifying impact resistance of various concrete mixtures were determined using an impact test machine, in accordance with ACI Committee 544. For this aim, concrete specimens containing three different aggregates (basalt, limestone and natural aggregate) were cured in water at 20°C for 28 days. After curing impact resistance tests were performed on specimens having compressive strength values between 20 and 50 MPa, to determine the blows to initial crack and failure. The specimens were also subjected to splitting tensile strength and ultrasonic pulse velocity tests. Initially, using blows to initial crack and failure, many attempts were made to classify the impact resistance of different types of concrete in terms of the origin of used aggregate, strength properties or ultrasonic pulse velocity, however, this made no sense. The specimens could only be classified in terms of steel fiber presence. Therefore, radial basis function network, which belongs to another kind of unsupervised classifier network, was used to estimate the two above-mentioned impact resistance parameters. In this scope, independent from aggregate origin used in preparation of specimens, compressive strength, splitting tensile strength and ultrasonic pulse velocity of the specimens were used to predict the impact resistance parameters of the concrete specimens. The results revealed that three listed parameters can be used for estimation of blows to formation of initial crack and failure. Scatter plots, root mean square error and absolute value of average residual parameters were used to verify the errors in predictions, which were very low, compared with the uncertainty in test and ambiguity of data in hand.
Źródło:
Acta Physica Polonica A; 2017, 132, 3; 1036-1040
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of a Polymer Based Syntactic Foam for High Temperature Applications
Autorzy:
Yazici, M.
Fahr, P.
Shukla, A.
Gunes, S.
Akay, S.
Powiązania:
https://bibliotekanauki.pl/articles/1182911.pdf
Data publikacji:
2014-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.05.Qk
81.70.Bt
81.40.-z
81.05.Lg
Opis:
Syntactic foams are one of the most widely used close cell structured foams. They are used in applications for naval, aeronautical, aerospace, civil, industrial, and automotive engineering due to good acoustical attenuation, excellent strength to weight ratio, vibration isolation, and dielectric properties. These foams are fabricated by incorporation of hollow particles in a matrix material. The most preferred matrix materials are polymers. In this study silicone resin (useful temperature range - 53C to 232°C) was selected as a binder material. Glass bubbles were incorporated into the silicone resin at three different mass percentages (10%, 20%, and 30%). The density of the silicone was reduced more than 50% by 30% glass bubble contribution. The foam mechanical properties were investigated in a room temperature and after heat treatment at 500C by quasi-static compression experiments. Microstructural transitions by the temperature raises were examined by using scanning electron microscopy pictures. It was observed that the increase of glass bubble percentage in silicone rubber enhanced the energy absorption properties in the heat treated and room temperature specimens. Plateau stress and densification amount were improved under quasi-static compression load by the glass bubble percentage increase. It can be said that developed syntactic foams can be used in heat resistant, low weight and high compression strength exigencies.
Źródło:
Acta Physica Polonica A; 2014, 125, 2; 526-528
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mechanisms of Plastic Deformation in Ti-Nb-Zr-Ta Based Biomedical Alloys with Fe and Si Content
Autorzy:
Stráský, J.
Harcuba, P.
Horváth, K.
Janeček, M.
Powiązania:
https://bibliotekanauki.pl/articles/1402084.pdf
Data publikacji:
2015-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.05.Bx
81.40.Cd
81.70.Bt
81.40.Lm
Opis:
Specialized beta titanium alloys containing biocompatible elements (Nb, Zr, Ta) are increasingly considered as a material for orthopaedic implants. In this study, small additions of Fe and Si are used to increase the strength of commercial Ti-35Nb-7Zr-5Ta (TNZT) alloy. Six different advanced alloys with iron content up to 2 wt% and silicon content up to 1 wt% were manufactured by arc melting and hot forging. Flow curves were determined from tensile tests carried out at room temperature. The yield stress is increased from 450 MPa to 700 MPa due to small Fe and Si additions. Fe causes solid solution strengthening exhibited by sharp yield point and significant work hardening. (Ti,Zr)₅Si₃ intermetallic particles further increase the strength via precipitation hardening. An unusual serrated yielding behaviour of benchmark TNZT alloy is caused by twinning as shown by acoustic emission measurement and electron backscattered diffraction analysis.
Źródło:
Acta Physica Polonica A; 2015, 128, 4; 574-577
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł

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