Results 271 to 280 of about 194,540 (292)

Anisotropic stiffness degradation triggers onset of strain localization

International Journal of Plasticity, 1997
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Loret, Benjamin, RIZZI, Egidio
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Property Degradation of Anisotropic Composite Laminates with Matrix Cracking. Part 2: Determination of Resolved Stiffness and Numerical Study of Stiffness Degradation

Journal of Reinforced Plastics and Composites, 1997
The study on property degradation of damaged composite laminates is extended to anisotropic laminates with matrix cracking. In Part 2 of the paper, a solution for partitioned stiffnesses is given to complete the constitutive relations developed in Part 1.
Hua Yu, Wang Xingguo, Li Zhengneng, He Qingzhi   +3 more
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Transverse cracks in cross-ply laminates 2. Stiffness degradation

Mechanics of Composite Materials, 1998
From the results of stress analysis between two transverse cracks in cross-ply laminate [1], a model for the stiffness reduction based on generalized plane strain assumptions has been developed. Simple analytical expressions are obtained for the longitudinal modulus and the Poisson's ratio as a function of the transverse crack density.
J. Varna, A. Krasnikovs
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Strain path dependent stiffness degradation of a loaded sheet

International Journal of Material Forming, 2008
Material stiffness is an important material property especially in analyses of springback, due to its influence on a final result. Despite all that, the elastic response of the formed part associated with the forming tools removal is in the most of computational analyses still performed by Hooke’s law and with initial values of elastic constants used ...
Marko Vrh, Miroslav Halilovič, Martin Mišič, Boris Štok   +3 more
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Stiffness degradation of non-plastic copper ore tailings

Géotechnique Letters
The accumulation of tailings from ore extraction processes presents significant challenges in geotechnical engineering and environmental management. Tailings possess complex mechanical behaviour and unique characteristics, making them particularly sensitive to seismic activity. This study investigates the stiffness degradation of two non-plastic copper
H. Patiño, F. Molina-Gómez, R. Galindo, A. Viana da Fonseca   +3 more
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Decomposition of Elastic Stiffness Degradation in Continuum Damage Mechanics

Journal of Engineering Materials and Technology, 2017
The degradation of elastic stiffness is investigated systematically within the framework of continuum damage mechanics. Consistent equations are obtained showing how the degradation of elastic stiffness can be decomposed into a part due to cracks and another part due to voids. For this purpose, the hypothesis of elastic energy equivalence of order n is
George Z. Voyiadjis, Peter I. Kattan
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Old Masonry under Seismic Loads: Stiffness Identification and Degradation

Structures Congress 2011, 2011
The behaviour of masonry under seismic loads has recently become of great interest. New methods for design and analysis, as well as models for resistance, have been developed. The main focus has been on experimental and analytical research for the development of new brick and mortar material whilst the characteristics of old brick material and mortar ...
T. Zimmermann, A. Strauss, R. Wendner
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Train-induced response of stiffness-degraded tunnel linings

Tunnelling and Underground Space Technology, 2023
Linfeng LI, Li Cheng, Weining LIU, Xiang Yu   +3 more
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Simulating soil stiffness degradation in transient site response predictions

Soil Dynamics and Earthquake Engineering, 2010
Abstract A series of nonlinear seismic ground response analyses are conducted to investigate the effect of soil degradation on the seismic response of typical sedimentary deposits in Southern California. For this purpose, three downhole array station sites at the Los Angeles basin are subjected to broadband synthetic ground motion excitations.
Wei Li, Dominic Assimaki
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Monitoring Elastic Stiffness Degradation in Graphite/Epoxy Composites

1987
Many stiffness-critical aerospace structures exploit the high specific stiffness of graphite/epoxy composites. Elastic-stiffness degradation of these materials is therefore important. Here a nondestructive technique is described that measures stiffness degradation of the graphite-fibers and epoxy-matrix.
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