Temat: shear plane - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: X-ray microtomography (μCT) as a useful tool for visualization and interpretation of shear strength test results
Autorzy:: Stefaniuk, D.
Tankiewicz, M.
Stróżyk, J.
Powiązania:: https://bibliotekanauki.pl/articles/178870.pdf
Data publikacji:: 2014
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: X-ray microtomography
shear strength
shear plane
fine-grained soil
triaxial test
Opis:: The paper demonstrates the applicability of X-ray microtomography (μCT) to analysis of the results of shear strength examinations of clayey soils. The method of X-ray three-dimensional imaging offers new possibilities in soil testing. The work focuses on a non-destructive method of evaluation of specimen quality used in shear tests and mechanical behavior of soil. The paper presents the results of examination of 4 selected clayey soils. Specimens prepared for the triaxial test have been scanned using μCT before and after the triaxial compression tests. The shear strength parameters of the soils have been estimated. Changes in soil structure caused by compression and shear failure have been presented as visualizations of the samples tested. This allowed for improved interpretation and evaluation of soil strength parameters and recognition of pre-existing fissures and the exact mode of failure. Basic geometrical parameters have been determined for selected cross-sections of specimens after failure. The test results indicate the utility of the method applied in soil testing.
Źródło:: Studia Geotechnica et Mechanica; 2014, 36, 4; 47-55
0137-6365
2083-831X
Pojawia się w:: Studia Geotechnica et Mechanica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Statistical analysis of experimental results in the in-plane shear test for a cross-ply vinylester-carbon laminate
Autorzy:: Bondyra, A.
Gotowicki, P.
Powiązania:: https://bibliotekanauki.pl/articles/245928.pdf
Data publikacji:: 2010
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: cross-ply laminate
vinylester-carbon laminate
in-plane shear modulus
in-plane shear strength
experimental studies
statistical analysis
Opis:: The study presents experimental studies on a regular cross-ply laminate of a [(0/90) F]4S configuration. Each layer is made of VE 11-M vinylester resin (the manufacturer: "Organika-Sarzyna" Chemical Plants) reinforced with aplain carbon fabric (the manufacturer: C. Cramer GmbH & Co. KG Division E CC). The carbon fabric has the following parameters: Styles 430, filament Carbon 6K, substance 300 g/m , warp and weft 400/400 tex, 3.7/3.7 band/cm. Laminate was produced by ROMA private enterprise using the vacuum molding technology and technological parameters developed by ROMA taking into account the VE l J-M material specification. A program of the experimental studies was aimed on statistical analysis of measurement results of the in-plane shear modulus and the in-plane shear strength of the laminate. In investigations, the in-plane shear test was carried out in accordance to the PN-EN ISO 14129:1997 standard [1], but applying the modified procedure that takes into consideration the results of the previous research on the influence of a traverse velocity and of a number of stress cycles on static measurements of the in-plane shear modulus [2]. The mean value, the standard deviation and the two-sided 95 percent confidence interval for the mean value for the investigated quantities have been determined. Practical usefulness ofthe manufacture technology of the laminate was assessed.
Źródło:: Journal of KONES; 2010, 17, 1; 41-49
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Determination of In-Plane Shear Properties of Laminate with V-Notch Rail Shear Test and Digital Image Correlation
Autorzy:: Karny, Maciej
Powiązania:: https://bibliotekanauki.pl/articles/36405939.pdf
Data publikacji:: 2019
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
Tematy:: digital image correlation
in-plane shear
thermoplastic laminates
v-notch rail shear
Opis:: This article presents the results of the application of Digital Image Correlation (DIC) to measurements of in-plane shear modulus and strength of three different carbon fiber reinforced laminates. Three different approaches to shear strain calculations via DIC are evaluated and compared with standard strain gage measurements. Calculation of shear strain based on averaging DIC strain values of strain gages area in most cases yielded results closest to strain gages, while measurements based on single point strain measuring differed the most from strain gages. These results are attributed to shear strain distribution in the center area of the specimen. Thermoplastic matrix fabric reinforced composite had the lowest shear strength at 5% of shear strain, but the highest ultimate shear strength and strain at failure. Of thermosetting materials, laminate reinforced with unidirectional carbon fiber had shear modulus about 10% lower, than fabric reinforced laminate, but higher ultimate strength and strain at failure. This behavior is attributed to the presence of weaves in fabric reinforcing the laminate, causing shear stiffening of the material, but lowering its ability to deform under shear loading.
Źródło:: Transactions on Aerospace Research; 2019, 3 (256); 57-65
0509-6669
2545-2835
Pojawia się w:: Transactions on Aerospace Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Influence of a crosshead rate and a number of stress cycles on measurement results in the in-plane shear test for a cross-ply vinylester-carbon laminate
Autorzy:: Bondyra, A.
Gotowicki, P.
Powiązania:: https://bibliotekanauki.pl/articles/245931.pdf
Data publikacji:: 2010
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: vinylester-carbon laminate
regular cross-ply laminate
in-plane shear test
experimental procedure
Opis:: The paper presents some experimental studies on a regular cross-ply laminate of the [(0/90)F] 4S configuration. Each layer is VE 11-M vinylester resin (the manufacturer: ,,Organika-Sarzvna" Chemical Plants, Sarzyna, Poland) reinforced with plam weave carbon fabric of parameters: Stvle 430, Carbon 6K, substance 300g/m2, warp/weft 400/400 tex, 3.7/3.7 yarn/cm (the manufacturer: C. Cramer GmbH & Co. KG Division ECC). The orthotropic laminate was produced by ROMA private enterprise In Grabowiec, Poland, using the vacuum molding method and the technological parameters developed by ROMA taking into account the VE 11-M material specijication. The PN-EN ISO 14129:1997 standard [1] and closely related standards [2-9] were taken into consideration in experimental studies on the static in-plane shear response by a tensile test of a [(plus or minus 45)F]nS laminate. A program of the experiments was focused on testing a rate of a testing machine crosshead and a number of static stress cycles. An influence of these factors on the in-plane shear modulus was investigated. Based on the conducted investigations, the modified experimental procedure has been proposed for determination of the correct value of the in-plane shear modulus and the in-plane shear strength.
Źródło:: Journal of KONES; 2010, 17, 1; 29-40
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Evaluation of geosynthetic interface friction at low normal stress: comparison between two different test procedures
Ocena oporów tarcia pomiędzy geosyntetykami podczas występowania małych naprężeń normalnych: porównanie dwóch metod badawczych
Autorzy:: Pavanello, P.
Carrubba, P.
Moraci, N.
Powiązania:: https://bibliotekanauki.pl/articles/28765739.pdf
Data publikacji:: 2022
Wydawca:: Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:: geosynthetic
interface friction
frictional resistance
shear resistance
shear test
direct shear test
horizontal shear test
normal stress
inclined plane
Źródło:: Acta Scientiarum Polonorum. Architectura; 2022, 21, 4; 3-10
1644-0633
Pojawia się w:: Acta Scientiarum Polonorum. Architectura
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: A note on the differences between Drucker-Prager and Mohr-Coulomb shear strength criteria
Autorzy:: Wojciechowski, M.
Powiązania:: https://bibliotekanauki.pl/articles/178873.pdf
Data publikacji:: 2018
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: Mohr-Coulomb
Drucker-Prager
elasto-plasticity
shear strength
plane strain conditions
Opis:: A systematic approach to measure the differences between Mohr-Coulomb (MC) and Drucker-Prager (DP) shear strength criteria used commonly in soil and rock mechanics is presented. It is shown that the DP criterion generates a shear strength between 0.6 and 3 times the MC strength, for the same friction angle and cohesion parameters. The appropriate conditions for obtaining equal shear strengths are given. Moreover, some new DP failure surfaces are proposed which minimize the differences relative to the MC predictions. The equivalence of the DP and MC criteria under plane strain conditions is also examined.
Źródło:: Studia Geotechnica et Mechanica; 2018, 40, 3; 163-169
0137-6365
2083-831X
Pojawia się w:: Studia Geotechnica et Mechanica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Investigations of shear localization in granular bodies within an anisotropic micro-polar hypoplasticity
Autorzy:: Tejchman, J.
Powiązania:: https://bibliotekanauki.pl/articles/241368.pdf
Data publikacji:: 2005
Wydawca:: Polska Akademia Nauk. Instytut Budownictwa Wodnego PAN
Tematy:: bedding plane
granular materials
hypoplasticity
micropolar theory
shear zone
texturial anisotropy
Opis:: The paper focuses on the numerical analysis of the effect of texturial anisotropy on shear localization in cohesionless granular materials. For simulation of the mechanical behaviour of a granular material during a monotonous deformation path, a hypoplastic constitutive model was used. To take into account a characteristic length of micro-structure, the constitutive model was extended by micro-polar terms. To take into account texturial effects, the granular hardness was modified. The calculations were carried out with a sand specimen during plane strain compression under constant lateral pressure. A stochastic and uniform distribution of the initial void ratio in the granular specimen was assumed. In addition, shear localization for two different uniform initial void ratios was investigated.
Źródło:: Archives of Hydro-Engineering and Environmental Mechanics; 2005, 52, 4; 351-371
1231-3726
Pojawia się w:: Archives of Hydro-Engineering and Environmental Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Shear stress in measuring section of the sample with modified wood
Autorzy:: Kyzioł, L.
Powiązania:: https://bibliotekanauki.pl/articles/242608.pdf
Data publikacji:: 2016
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: modified wood
mechanical properties
Iosipescu shear test
device to inflict plane stress
Opis:: The shear strength of anisotropic materials is carried out on the special samples and on the appropriate instrumentation. Research conducted to obtain a homogenous state of the shear stress in the plane sample is difficult, and involve numerous occurrence of additional stress. Therefore, it is difficult to determine the shear strength. The wood composites are classified as orthotropic materials. In addition, are composed of the layers early wood and latewood. The layers have different thicknesses and exhibit different strength properties. The principal method for determining the shear stress is the trial of twisting of thin-walled tubes. Production of the pipe samples from the wood to determine the shear stress is impossible, due to annual rings. Beginning of destruction of samples under load was registered by a prototype device. This device makes the realization of plane state of stress in the sample possible. The position of the axis of the sample relative to the direction of the load can be varied. Such configuration axle of the sample to the loading direction, allows to perform, also stretching or compression besides to shear. The tests were performed for the natural wood and surface modified wood. The paper presents an original method and device designed to determine the shear strength of anisotropic materials on the example of natural wood and a surface modified wood.
Źródło:: Journal of KONES; 2016, 23, 1; 193-198
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Simulation of shear localization in granular bodies within gradient-enhanced hypoplasticity
Autorzy:: Tejchman, J.
Powiązania:: https://bibliotekanauki.pl/articles/241309.pdf
Data publikacji:: 2004
Wydawca:: Polska Akademia Nauk. Instytut Budownictwa Wodnego PAN
Tematy:: characteristic length
finite element method
gradient model
plane strain compression
shear localization
Opis:: The paper presents a FE-analysis of a spontaneous shear localization inside non-cohesive sand during plane strain compression. The calculations were carried out with a gradient-enhanced hypoplastic constitutive law. The hypoplastic law can reproduce essential features of granular bodies depending on the void ratio, pressure level and deformation direction. To model the thickness of shear zones, a characteristic length of the microstructure was incorporated via the second gradient of the modulus of the deformation rate. To determine the effect of micro-structure, the analysis was performed with different characteristic lengths for the same specimen size.
Źródło:: Archives of Hydro-Engineering and Environmental Mechanics; 2004, 51, 3; 243-265
1231-3726
Pojawia się w:: Archives of Hydro-Engineering and Environmental Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Anti – plane crack emanating from the interface in a bounded smart PEMO- elastic structure
Autorzy:: Rogowski, B.
Powiązania:: https://bibliotekanauki.pl/articles/955285.pdf
Data publikacji:: 2013
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:: interfejs
natężenie pola
transformacja Fouriera
równanie Cauchy'ego
interface
anti-plane shear crack
singularity of power law
field intensity factors
magnetoelectroelastic behaviour
Fourier transform
Cauchy singular integral equation
exact solution
Opis:: The magnetoelectroelastic analysis of two bonded dissimilar piezo-electro-magneto-elastic ceramics with a crack perpendicular to and terminating at the interface is made. By using the Fourier integral transform (in perpendicular directions in each materials), the mixed boundary conditions and continuity conditions are transformed to a singular integral equation with generalized Cauchy kernel, the solution of which has been well studied, and classical methods are directly applicable here to obtain the closed form solution. The results are presented for a permeable crack under anti-plane shear loading and in-plane electric and magnetic loadings, as prescribed electric displacement and magnetic inductions or electric and magnetic fields. The results indicate that the magnetoelectroelastic field near the crack tip in the homogeneous PEMO- elastic ceramic is dominated by a traditional inverse square-root singularity, while the coupled field near the crack tip at the interface exhibits the singularity of the power law r--α , r being the distance from the interface crack tip and α depending on the material constants of a bimaterial. In particular, electric and magnetic fields have no singularity at the crack tip in a homogeneous solid, whereas they are singular around the interface crack tip. Numerical results are given graphically to show the effects of the material properties on the singularity order, field intensity factors and energy release rates. The results presented in this paper should have potential applications to the design of multilayered magnetoelectroelastic structures.
Źródło:: International Journal of Applied Mechanics and Engineering; 2013, 18, 4; 1165-1199
1734-4492
2353-9003
Pojawia się w:: International Journal of Applied Mechanics and Engineering
Dostawca treści:: Biblioteka Nauki

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