Results 261 to 270 of about 543,247 (306)

Phenomenological Modelling of Rate-Dependent Plasticity for High Strain Rate Problems

Mechanics of Materials, 1988
Abstract The results of two related theoretical investigations for large-scale computations of elasto-plastic deformations at ultrahigh strain rates are summarized in this paper. The first effort concerns the development of a phenomenological constitutive model for finite deformation elasto-plasticity which includes the effects of thermal softening ...
S. Nemat-Nasser, D.-T. Chung, L.M. Taylor   +2 more
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A strain-rate dependent crack model

Journal of the Mechanics and Physics of Solids, 1971
Abstract A uniformly moving crack, preceded by a thin plastic zone, in which the yield stress is linearly dependent on the strain rate, is considered, in both plane and anti-plane strain. This model is used to calculate the variation of the stress intensity factor with crack velocity in the limit of small-scale yielding and the unsteady motion of a
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Multi-Stepwise Strain-Rate Loading Consolidation Test to Evaluate Strain Rate Dependency

2019
To evaluate the long-term consolidation characteristics on the basis of the isotache concept, long-term consolidation test is required. However, it is very difficult to conduct long-term consolidation test in practice, because it takes a very long test period of three weeks or longer. In order to solve this problem, a multi-staged loading constant rate
Yoichi Watabe, Akane Yoneda, Hideo Hashizume, Yusuke Ono   +3 more
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Shear stability and strain, strain-rate and temperature-dependent “cold” work

International Journal of Engineering Science, 2001
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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Strain-rate-dependent failure criteria for composites

Composites Science and Technology, 2011
Abstract The objective of this study was to characterize the quasi-static and dynamic behavior of composite materials and develop/expand failure theories to describe static and dynamic failure under multi-axial states of stress. A unidirectional carbon/epoxy material was investigated.
I.M. Daniel, B.T. Werner, J.S. Fenner
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Strain-Rate-Dependent Behavior of Polymeric Foams

52nd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference, 2011
In many applications composite sandwich structures with polymeric foam cores are exposed to high energy and high velocity dynamic loadings producing multi-axial dynamic states of stress. The material studied was a closed cell PVC foam, an orthotropic/transversely isotropic material, exhibiting strain-rate-dependent elastic/viscoplastic behavior.
Isaac Daniel, Jeong-Min Cho
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Strain and Strain rate-dependent Mechanical Metamaterials

Generally, after the manufacturing process, the mechanical behaviors of a meta-structure or material are set and are hardly modified. Nevertheless, materials and structures with varying static or dynamical mechanical properties are attractive to many engineering fields.
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A Constitutive Equation Describing Strain Hardening, Strain Rate Sensitivity, Temperature Dependence and Strain Rate History Effect

1991
A constitutive equation with which strain hardening, strain rate sensitivity, temperature dependence and strain rate history effect can be described covering a wide range of strain rates is proposed. To describe the strain hardening and the strain rate history effect, a new idea which takes into account the plastic work in a manner of fading memory is ...
Shinji Tanimura, Koichi Ishikawa
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Dependence of magnitude statistics on strain rate

Bulletin of the Seismological Society of America, 1976
Abstract Magnitude statistics (log N = a − bM) were measured for mine tremors and for the Parkfield earthquakes, listed by McEvilly, Bakun and Casaday (1967), in conditions of varying rates of aseismic ground deformation. Aseismic deformation rates were estimated using a tiltmeter in the ERPM gold mine and using results from small ...
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Cancer Statistics, 2021

Ca-A Cancer Journal for Clinicians, 2021
Rebecca L Siegel, Kimberly D Miller
exaly