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    Tytuł:
    Investigation into the growgth directions of a ductile crack under tensile loading
    Autorzy:
    Zhang, Xiao--Bing
    Li, Jia
    Recho, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/279697.pdf
    Data publikacji:
    1999
    Wydawca:
    Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
    Tematy:
    fracture
    full elastic--plastic field
    crack propagation criteria
    Opis:
    In this paper, we use an energy variational methodto study the full stress field near a stationary crack in a plane state in a power--law hardening material under mode I liading. Associated with the finite element method the trejectory line fields of the principal stresses and the maximum shear stresses have been drawn in order to determine the crack growth direction. It appears that the crack can propagate along a cleavage band or along a slip band according to the triaxial tensile stress level in the vicnity of the crack. The growth direction of a ductile crack depends on the competition between the stress concentractions along these bands.
    W pracy zastosowano metodę wariacji energii do badania pełnego pola naprężeń wokół stacjonarnego pęknięcia w płaski stanie odkształcenia dla materiału o potęgowym wzmocnieniu dla I typu obciążenia. Przy pomocy metody elementów skończonych wyznaczono pola trajektorii naprężeń głównych i maksymalnych naprężeń ścinających w celu określenia kierunku wzrostu szczeliny. Stwierdzono, iż pęknięcie rozwija się wzdłuż pasm rozdzielczości lub pasm ścinania, zgodnie z poziomem trójosiowych naprężeń rozciągających w otoczeniu pęknięcia. Kierunek wzrostu pęknięcia ciągliwego zależy od relacji pomiędzy koncentracjami naprężeń wzdłuż tych pasm.
    Źródło:
    Journal of Theoretical and Applied Mechanics; 1999, 4; 779-789
    1429-2955
    Pojawia się w:
    Journal of Theoretical and Applied Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hyperelastic modelling of rubber with multi-walled carbon nanotubes subjected to tensile loading
    Autorzy:
    Jweeg, M.J.
    Alazawi, D.A.
    Jebur, Q.H.
    Al-Waily, M.
    Yasin, N.J.
    Powiązania:
    https://bibliotekanauki.pl/articles/24200544.pdf
    Data publikacji:
    2022
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    rubber nanocomposite materials
    rubber characterisation
    rubber nanocomposite
    strain energy
    hyperelastic materials model
    rubber modelling
    gumowe materiały nanokompozytowe
    charakterystyka gumy
    nanokompozyt gumowy
    energia odkształcenia
    model materiałów hiperelastycznych
    modelowanie gumy
    Opis:
    Purpose: This study thoroughly examined the application of inverse FE modelling and indentation tensile tests to identify nanotubes' rubber material properties. indentation tensile tests to identify nanotubes' rubber material properties. Design/methodology/approach: Carbon nanotubes with various percentages of multi-walled carbon nanotubes exposed to high tensile stress were used to enhance the mechanical qualities of N.R. rubber. Findings: In this work, carbon nanotubes have been added to natural rubber. By using a solvent casting technique, toluene was used to make nanocomposites. 0.2%, 0.4%, 0.6%, 0.8%, and 1%. In this article, rubber and multi-walled carbon nanotubes interact in practical ways. Mechanical features of carbon nanotubes in NR have been researched. The results will lead to rubber products with improved mechanical qualities compared to present nanocomposite rubber containing various percentages of multi-walled carbon nanotubes exposed to large tensile test loading. The relative fitness error for significant stresses is reasonable with a second or third-order deformation model in numerical results. Research limitations/implications: Non-linear finite element analysis is widely used to optimise complicated elastomeric components' design and reliability studies. However, accurate numerical results cannot be achieved without using rubber or rubber nanocomposite materials with reliable strain energy functions. Practical implications: The indentation tensile tests of rubber samples have been simulated and confirmed using a parametric FE model. An inverse materials parameter identification algorithm was used to calculate the hyperelastic material properties of rubber samples evaluated in uniaxial tensile. Using ABAQUS FE software, material parameters and force-displacement data may be automatically updated and extracted. Originality/value: The numerical data for the inverse method of material property prediction has been successfully established by developing simulation spaces for various material characteristics. The force-displacement curve can be represented using technical methods. The results demonstrate that the inverse FE modelling process might be simplified by using these curve fitting parameters and plot equations to build a mathematical link between curve coefficients and material properties. The first, second, and third-order deformation models were tested using FE simulations for the tensile test.
    Źródło:
    Archives of Materials Science and Engineering; 2022, 114, 2; 69--85
    1897-2764
    Pojawia się w:
    Archives of Materials Science and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hyperelastic models for the description and simulation of rubber subjected to large tensile loading
    Autorzy:
    Jebur, Q.H.
    Jweeg, M.J.
    Al-Waily, M.
    Ahmad, H.Y.
    Resan, K.K.
    Powiązania:
    https://bibliotekanauki.pl/articles/2175788.pdf
    Data publikacji:
    2021
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    rubber
    carbon black
    filler
    hyperelastic models
    Abaqus
    FEM
    guma
    sadza
    wypełniacz
    modele hiperelastyczne
    MES
    Opis:
    Purpose: Rubber is widely used in tires, mechanical parts, and user goods where elasticity is necessary. Some essential features persist unsolved, primarily if they function in excessive mechanical properties. It is required to study elastomeric Rubber's performance, which is operational in high-level dynamic pressure and high tensile strength. These elastomeric aims to increase stress breaking and preserve highly pressurised tensile strength. Design/methodology/approach: The effects of carbon black polymer matrix on the tensile feature of different Rubber have been numerically investigated in this research. Rubber's material characteristics properties were measured using three different percentages (80%, 90%and 100%) of carbon black filler parts per Hundreds Rubber (pphr). Findings: This study found that the tensile strength and elongation are strengthened as the carbon black filler proportion increases by 30%. Practical implications: This research study experimental tests for Rubber within four hyperelastic models: Ogden's Model, Mooney-Rivlin Model, Neo Hooke Model, Arruda- Boyce Model obtain the parameters for the simulation of the material response using the finite element method (FEM) for comparison purposes. These four models have been extensively used in research within Rubber. The hyperelastic models have been utilised to predict the tensile test curves—the accurate description and prediction of elastomer rubber models. For four models, elastomeric material tensile data were used in the FEA package of Abaqus. The relative percentage error was calculated when predicting fitness in selecting the appropriate model—the accurate description and prediction of elastomer rubber models. For four models, elastomeric material tensile data were used in the FEA package of Abaqus. The relative percentage error was calculated when predicting fitness in selecting the appropriate model. Numerical Ogden model results have shown that the relative fitness error was the case with large strains are from 1% to 2.04%. Originality/value: In contrast, other models estimate parameters with fitting errors from 2.3% to 49.45%. The four hyperelastic models were tensile test simulations conducted to verify the efficacy of the tensile test. The results show that experimental data for the uniaxial test hyperelastic behaviour can be regenerated effectively as experiments. Ultimately, it was found that Ogden's Model demonstrates better alignment with the test data than other models.
    Źródło:
    Archives of Materials Science and Engineering; 2021, 108, 2; 75--85
    1897-2764
    Pojawia się w:
    Archives of Materials Science and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An analytical study on the elastic-plastic behavior of metal matrix composites under tensile loading
    Autorzy:
    Khosoussi, S.
    Mondali, M.
    Abedian, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/281901.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
    Tematy:
    metal matrix composites
    plasticity in matrix
    shear lag
    Opis:
    An analytical approach is proposed for studying the elastic-plastic behavior of short fiber reinforced metal matrix composites under tensile loading. In the proposed research, a micro- mechanical approach is employed considering an axi-symmetric unit cell including one fiber and the surrounding matrix. First, the governing equations and the boundary conditions are derived and the elastic solution is obtained based on some shear lag type methods. Since under normal loading conditions and according to the fiber material characteristics the me- tal matrix undergoes plastic deformation, while the fiber remains within the elastic region, a plastic deformation is obtained for the matrix under each small tensile loading step. Then, the elastic-plastic stress transfer behavior of the composite is studied considering this plastic deformation. The results are finally compared with the numerical results obtained from the FE analysis of the considered micromechanical model.
    Źródło:
    Journal of Theoretical and Applied Mechanics; 2014, 52, 2; 323-334
    1429-2955
    Pojawia się w:
    Journal of Theoretical and Applied Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Spinal sections and regional variations in the mechanical properties of the annulus fibrosus subjected to tensile loading
    Autorzy:
    Żak, M.
    Pezowicz, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/307024.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    intervertebral disc
    annulus fibrosus
    tensile properties
    dissipated energy
    hydration
    krążek międzykręgowy
    naprężenie
    nawodnienie ustroju
    Opis:
    The annulus fibrosus is the primary load-bearing component of the intervertebral disc responsible for proper transfer of loads in the spine. The aim of this study was to determine selected mechanical parameters of multilayer specimens of the annulus fibrosus of the intervertebral disc during uniaxial tensile loading. The anatomical location (anterior/posterior) of the test specimens of the annulus fibrosus and its location along the length of the spine were analysed to determine their impact on the maximum failure force, stiffness, the value of Young’s modulus and dissipated energy. The results indicated high energy losses over the five consecutive precondition loops while the value of the force remained at a constant level. The thoracic and lumbar specimens showed the highest values of the parameters analysed. There were also significant changes depending on the anatomical region of the intervertebral disc, where anterior specimens demonstrated higher mechanical values compared to posterior specimens.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2013, 15, 1; 51-59
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Polypropylene tensile test under dynamic loading
    Autorzy:
    Khlif, M.
    Masmoudi, N.
    Bradai, Ch.
    Powiązania:
    https://bibliotekanauki.pl/articles/245878.pdf
    Data publikacji:
    2014
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    dynamic tension
    polypropylene
    high strain rate
    hopkinson bar
    sensing block
    Opis:
    In this paper, a testing method is developed to determine the dynamic stress–strain responses of the polypropylene (PP) under high strain rate uniaxial tension conditions. The main objective of this study is to determine the dynamical behaviour of PP materials under transitory loading. To this effect, an experimental machine using a mixed technique of Hopkinson tension bar and a sensing block system is developed in order to study the dynamic tensile stress–strain behaviour of the low-strength and low mechanical impedance specimen. A pendulum pulse technique is employed in dynamic tension experiments to ensure that valid experimental conditions are satisfied. Results show that, compared with quasi-static behaviour, dynamic tension causes smaller failure strains. Among other, the experimental set-up, mechanical characteristic, dynamic tensile specimen, quasi-static tensile test: stress–strain curve for 0.8 s-1 strain rate, the incident and the transmitted waves recorded by the stain gauges located on the bar and the sensing block under a dynamic tensile test, the axial strain on the specimen versus time under a dynamic tensile test, the axial stress on the specimen versus time under a dynamic tensile test, dynamic tensile test: stress-strain curves of the PPC7712 polymer for various strain rates, the specimens after rupture quasi-static test and dynamic test are presented in the paper.
    Źródło:
    Journal of KONES; 2014, 21, 1; 131-138
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Welding Current and Time on Tensile-Peel Loading in Resistance Spot Welding of SPA-H Steel Sheets Used in Railway Vehicles
    Autorzy:
    Akkaş, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/1031788.pdf
    Data publikacji:
    2017-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    resistance spot welding
    tensile-peel loading
    weathering steel sheets
    Opis:
    This paper presents an experimental study on resistance spot welding of SPA-H weathering steel sheets used in side wall and roof application of rail vehicle bodies. SPA-H steel sheets having 2.3 mm thicknesses were joined by using resistance spot welding as lap joint. A timer and current controlled resistance spot welding machine having 120 kVA capacity and a pneumatic application mechanism with a single lever was used to prepare the specimens. Welding periods were chosen as 10, 15, 20, 25, and 30 periods (1 period =0.02 s) and also welding currents were increased from 6 kA up to 11 kA by rise of 0.5 kA. The electrode force was kept constant at 4 kN. The prepared welding specimens were exposed to tensile-peel test and the obtained results were supported by diagrams and, finally, appropriate welding current and time were advised to the users.
    Źródło:
    Acta Physica Polonica A; 2017, 132, 3; 549-552
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Lamb wave-based monitoring of shear failure of an adhesive lap joint
    Monitorowanie zniszczenia ścinanego połączenia klejonego za pomocą fal Lamba
    Autorzy:
    Rucka, M.
    Wojtczak, E.
    Lachowicz, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/327588.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
    Tematy:
    adhesive joint
    tensile loading
    ultrasonic waves
    damage assessment
    structural health monitoring
    złącze klejone
    obciążenie rozciągające
    fale ultradźwiękowe
    ocena uszkodzeń
    monitoring techniczny
    Opis:
    The paper presents a study on the elastic wave propagation in adhesive joints of steel plates subjected to tensile loading. A single lap joint was chosen for analysis because of its simplicity and plurality of applications. Experimental investigations consisted of the uniaxial extension of prepared specimens. Force and displacement values were recorded by a testing machine. Simultaneously, guided Lamb waves were excited and signals of their propagation were collected in a number of points by piezoelectric transducers attached to the specimen surface. Further processing of signals allowed to determine some disturbances in gathered data. The continuous wavelet transform revealed discontinuities in force-displacement relations. The Fourier transform showed changes in frequency values of recorded signals. Large disturbances of the root mean square values were also observed. The results of all analyses allowed to conclude that the identification of partial degradation state before the sample destruction was possible.
    Artykuł przedstawia badania propagacji fal sprężystych w połączeniach klejonych płyt stalowych poddanych działaniu obciążenia rozciągającego. Pojedyncze złącze zakładkowe zostało wybrane do analizy ze względu na jego prostotę i mnogość zastosowań. Badania eksperymentalne polegały na jednoosiowym rozciąganiu przygotowanych próbek. Wartości siły i przemieszczenia były zapisywane przez maszynę wytrzymałościową. Jednocześnie, wzbudzano fale prowadzone Lamba, a sygnały ich propagacji rejestrowano w kilku punktach za pomocą czujników piezoelektrycznych przymocowanych do powierzchni próbki. Dalsza obróbka sygnałów pozwoliła na wykrycie pewnych zaburzeń w zebranych danych. Ciągła transformacja falkowa ukazała nieciągłości w zależnościach siła-przemieszczenie. Transformacja Fouriera pokazała zmiany w wartościach częstotliwości zarejestrowanych sygnałów. Zaobserwowano także duże skoki wartości średniej kwadratowej. Wyniki przeprowadzonych analiz pozwoliły na sformułowanie wniosku, iż identyfikacja stanu częściowej degradacji przed zniszczeniem próbek była możliwa.
    Źródło:
    Diagnostyka; 2018, 19, 4; 51-57
    1641-6414
    2449-5220
    Pojawia się w:
    Diagnostyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of collagen fibres and elastic lamellae content on the mechanical behaviour of abdominal aortic aneurysms
    Autorzy:
    Kobielarz, Magdalena
    Powiązania:
    https://bibliotekanauki.pl/articles/27324131.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    abdominal aortic aneurysm
    mechanical properties
    constitutive modelling
    uniaxial tensile loading
    collagen fibres
    elastic lamellae
    tętniak aorty brzusznej
    właściwości mechaniczne
    modelowanie konstytutywne
    jednoosiowe obciążenie rozciągające
    włókna kolagenowe
    elastyczne lamele
    Opis:
    Purpose: The main purpose of this study was a detailed analysis of the mechanical and structural characteristics of human abdominal aneurysms in comparison with normal abdominal aortae and determination of the correlations between their mechanical behaviour and the microstructural content. Methods: Various mechanical properties, i.e., mechanical failure properties, elastic moduli, inflection point coordinates, index of anisotropy and incompressibility were determined under uniaxial loading conditions in the circumferential and axial directions. Constitutive parameters were derived from the commonly used constitutive model proposed by Holzapfel et al. [9]. The microstructural arrangement was examined by histological staining supported by scanning electron microscopy analysis. The content of collagen fibres and elastic lamellae was tested in relation to mechanical properties and constitutive parameters. Results: Significant differences were found in the microstructural arrangement and layer composition of the aneurysmal specimens, compared to the normal aorta group. The mechanical properties and constitutive parameters of the aneurysmal specimens were significantly altered, indicating a weakening of the load-bearing properties of the walls of the aneurysms. A comparative analysis discovered significant correlations between structural composition and mechanical parameters, in particular with respect to the number of collagen fibres and failure stress, which can be important for clinical evaluation of abdominal aortic aneurysm (AAA) rupture. Conclusions: Changes in the content of collagen fibres and elastic lamellae correlate with mechanical and constitutive parameters, indicating AAA severity
    Źródło:
    Acta of Bioengineering and Biomechanics; 2020, 22, 3; 9--21
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Welding Time Effect on Tensile-Shear Loading in Resistance Spot Welding of SPA-H Weathering Steel Sheets Used in Railway Vehicles
    Autorzy:
    Akkaş, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/1032521.pdf
    Data publikacji:
    2017-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.20.Vj
    06.60.Vz
    Opis:
    This paper presents an experimental study on the resistance spot welding of SPA-H weathering steel sheets used in side wall and roof application of rail vehicle bodies. A timer and current controlled resistance spot welding machine having 120 kVA capacity and a pneumatic application mechanism with a single lever were used to prepare the specimens. Welding periods were chosen as 10, 15, 20, 25, and 30 periods (1 period = 0.02 s) and also welding currents were increased from 6 kA up to 11 kA by rises of 0.5 kA. The electrode force was kept constant at 4 kN. The prepared welding specimens were exposed to tensile-shear test and the obtained results were supported by diagrams and, finally, appropriate welding parameters were advised to the users.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 1; 52-54
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Welding Current on Tensile-Peel Loading of Welding Joints in TRIP 800 and Micro-Alloyed Steels in Resistance Spot Welding
    Autorzy:
    Onar, V.
    Aslanlar, S.
    Akkaş, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/1031462.pdf
    Data publikacji:
    2017-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    resistance spot welding
    welded joint
    automotive steels
    tensile-peel test
    Opis:
    In this paper, an analysis of electric resistance spot welding between micro-alloyed steel sheets having 1 mm thickness and TRIP 800 (transformation induced plasticity) steel sheets having 1.5 mm thickness was made. Couples of steel sheets are used in automobile industry. Steel pairs were joined by using resistance spot welding as overlap joint. A timer and current controlled resistance spot welding machine had pneumatic application mechanism and 120 kVA capacity. Preparation of specimens by spot welding was performed using different cycles ranging from 5 to 30 cycle and welding currents ranging from 8.5 to 16.5 kA by rise of 0.5 kA. The electrode force was kept constant at 6 kN. The prepared welding specimens were exposed to tensile-peel tests and the obtained results were supported by diagrams. Finally, appropriate welding parameters were advised to the users.
    Źródło:
    Acta Physica Polonica A; 2017, 132, 3; 822-824
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evolution of tensile properties of the TiAl6V4 alloy due to the prior cyclic loading history
    Autorzy:
    Moćko, W.
    Kowalewski, Z. L.
    Powiązania:
    https://bibliotekanauki.pl/articles/281363.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
    Tematy:
    fatigue
    metals and alloys
    deformation and fracture
    cumulative fatigue damage
    Opis:
    The influence of the initial fatigue loading on tensile characteristics of the TiAl6V4 titanium alloy is presented in this work. For cumulative fatigue damage equal to 0.75, a decrease in the pre-fatigue amplitude leads to a lowering in the elongation. Moreover, independent of the amplitude, the loading induces an increase in the yield stress by approximately 100MPa. An increase in the number of pre-fatigue cycles at a constant amplitude results in a decrease in the elongation. Such mechanical behaviour is related to the cyclic hardening effect and the development of fatigue damage, which clearly affects the tensile characteristics of the alloy.
    Źródło:
    Journal of Theoretical and Applied Mechanics; 2014, 52, 3; 847-851
    1429-2955
    Pojawia się w:
    Journal of Theoretical and Applied Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of Uniaxial Tensile Tests for Homogeneous Solid Propellants under Various Loading Conditions
    Autorzy:
    Zalewski, R.
    Wolszakiewicz, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/358469.pdf
    Data publikacji:
    2011
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    solid propellants
    experimental results
    temperature
    strain rate
    Opis:
    The main object of this paper is to reveal basic response of solid rocket fuels to different working conditions such as variable strain rates or temperature. Experimental data acquired during experimental tests is a base for development of a suitable constitutive model for homogeneous solid propellants. In the world literature there is still insuffcient information about typical mechanical features for considered materials. Universal standards for carrying out typical strength experiments have not yet been fully elaborated for this type of materials. Such problems as quasi-static strain range for solid propellants or so called scale effect are still not standardized. Though, this paper is a next step in preliminary investigation devoted to modeling of nonlinear properties of solid propellants. In particular, the infuence of temperature and strain rate on selected mechanical parameters variations is discussed.
    Źródło:
    Central European Journal of Energetic Materials; 2011, 8, 4; 223-231
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of moisture content, rate of loading and height regions on tensile strength of alfalfa stems
    Autorzy:
    Galedar, M.N.
    Tabatabaeefar, A.
    Jafari, A.
    Sharifi, A.
    Rafiee, S.
    Mohtasebi, S.S.
    Powiązania:
    https://bibliotekanauki.pl/articles/26112.pdf
    Data publikacji:
    2009
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Źródło:
    International Agrophysics; 2009, 23, 1; 27-30
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessment of the critical values of stress and strain of material on the basis of analysis of uniaxial tensile test data
    Autorzy:
    Dzioba, I.
    Lipiec, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/312407.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Naukowo-Wydawniczy "SPATIUM"
    Tematy:
    ferritic steel
    steel S355JR
    deformation of steel
    critical deformation
    Ramberg-Osgood relationship
    uniaxial random loading
    stal ferrytyczna
    stal S355JR
    odkształcenia stali
    odkształcenie krytyczne
    prawo Ramberga-Osgooda
    rozciąganie jednoosiowe
    Opis:
    In the article, a method of determining the critical level of deformation of ferritic steel S355JR on the basis of measurements of grain elongation is proposed. Tests were carried out on steel in two microstructure states: ferrite-pearlite and bainite. Parameter values for the Ramberg-Osgood law and true stress-strain dependencies were set. The results obtained were compared with the results obtained according to other methods.
    Źródło:
    Autobusy : technika, eksploatacja, systemy transportowe; 2016, 17, 4; 54-57
    1509-5878
    2450-7725
    Pojawia się w:
    Autobusy : technika, eksploatacja, systemy transportowe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-15 z 15

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