Results 241 to 250 of about 4,272,554 (282)

Damage Evolution in Filled Elastomers

1991
Abstract : This report summarizes accomplishments on the development of mathematical models of distributed microcracking in filled elastomers, such as solid propellant, and in other linear and nonlinear viscoelastic composite materials. The work is divided into two parts. The first part is concerned with elastic composites while the second part extends
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Damage evolution in viscoelastic polymers

AIP Conference Proceedings, 2000
Constitutive relations are derived for viscoelastic polymers. These relations are applicable to polymers for temperatures above their glass transition temperature and strain rates ranging from quasistatic up to shock regimes. Linear viscoelasticity is assumed for small tensile deformations but nonlinear effects, arising from void growth, become ...
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Damage evolution

2023
George Z. Voyiadjis, Peter I. Kattan
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On the dynamic evolution of ductile damage

International Journal of Fracture, 1996
In the present report some numerical results on the evolution equation of microvoids under quasi-static simplification (without consideration of inertial effect) are given in terms of the increasing rate of porosity versus external stress at different damage levels and in various damage stages at different material viscosities.
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Evolution of damage and healing

2023
George Z. Voyiadjis, Peter I. Kattan
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Dynamics of Stochastic Damage Evolution

International Journal of Damage Mechanics, 1998
Characteristic features of damage accumulation under arbitrary stochastic conditions are studied in terms of continuum damage mechanics (CDM). A uniaxial tension case is chosen for a simplicity of discussion and clearness of results' interpretations.
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Analysis of Shear Damage Evolution

International Journal of Damage Mechanics, 1998
Shear damage development under constant stress is studied on the basis of the analytical solution of kinetic equations of damage accumulation. The existence of two threshold stresses is linked with the presence of three various stress intervals and respective regimes of damage growth.
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Kinetic Laws of Damage Evolution

1992
The physical nature of damage has been defined in the first chapter. The definition of the damage variable as the effective surface density of microcracks in a Representative Volume Element associated with the effective stress concept and the principle of equivalence has given rise to methods of damage measurement through changes in elasticity or ...
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Damage Evolution and Failure Modes

1995
A polycrystalline solid is said to deform in a ductile (or plastic) mode if “the material flows through the crystal via dislocation motion,..., whereas the lattice itself, with the material embedded on it, undergoes elastic deformation and rotation” [1].
D. Krajcinovic, S. Mastilovic
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Oxygen Deficiency and Brain Damage: Localization, Evolution in Time, and Mechanisms of Damage

Journal of Toxicology: Clinical Toxicology, 1985
Observations on some patients with CO intoxication have revealed a delayed type of brain injury, with symptoms appearing days after the initial insult. Possible mechanisms are discussed, with reference to recent experimental results on ischemic brain damage.
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