Results 161 to 170 of about 1,222,625 (192)
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Damage evolution in ductile materials: from micro- to macro-damage
Computational Mechanics, 1995This research presents a new simulation concept of damage evolution for metallic materials under large displacements and deformations. The complete damage range is subdivided into both the micro-damage and the macro-damage range. The micro-damage phase is described by the Cocks/Ashby void-growth model for isotropic, ductile materials under isothermal ...
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Damage Evolution in Ductile Materials
International Journal of Damage Mechanics, 1996A continuum damage evolution model for ductile materials is derived from the principles of incremental complementary energy and thermodynamics. In accordance with this model, the evolution of damage is dependent on the accumulated strain, the stress triaxiality ratio, and the strain hardening exponent of the material.
Yanghu Mou, Ray P. S. Han
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Damage evolution in viscoelastic polymers
AIP Conference Proceedings, 2000Constitutive 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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An improved nonlinear damage model of rocks considering initial damage and damage evolution
International Journal of Damage Mechanics, 2020The experimental results show that the creep properties of the rocks are affected by the initial damage, and the damage evolution also has a significant impact on the time-dependent properties of the rocks during the creep. However, the effects of the initial damage and the damage evolution are seldom considered in the current study of the rocks ...
Wenlin Feng +4 more
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Ductile Damage Evolution and Strain Path Dependency
AIP Conference Proceedings, 2007Forming limit diagrams are commonly used in sheet metal industry to define the safe forming regions. These diagrams are built to define the necking strains of sheet metals. However, with the rise in the popularity of advance high strength steels, ductile fracture through damage evolution has also emerged as an important parameter in the determination ...
Tasan, C.C. +5 more
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Radiation damage evolution in ceramics
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2009A review is presented of recent results on radiation damage production, defect accumulation and dynamic annealing in a number of ceramics, such as silicon carbide, zircon and zirconia. Under energetic particle irradiation, ceramics can undergo amorphization by the accumulation of point defects and defect clusters (silicon carbide) or direct impact ...
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Evolution of DNA damage in irradiated cells
Journal of Mathematical Biology, 1992Ionizing radiation damage to a mammalian genome is modeled using continuous time Markov chains. Models are given for the initial infliction of DNA double strand breaks by radiation and for the enzymatic processing of this initial damage. Damage processing pathways include DNA double strand break repair and chromosome exchanges.
Hahnfeldt, P. +2 more
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Threshold-based Quasi-static Brittle Damage Evolution
Archive for Rational Mechanics and Analysis, 2008zbMATH Open Web Interface contents unavailable due to conflicting licenses.
GARRONI, Adriana, Christofer Larsen
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Damage evolution and damage model validation in spalled tantalum
Le Journal de Physique IV, 2000The dynamic damage resistance of two grades of very clean tantalum is compared. The materials were loaded to incipient failure using an 80 mm gas gun equipped with soft recovery using a parallel flyer plate experimental configuration. Both loading time and applied shock pressure was varied from 1.1-2 μs and 5.6-9.8 GPa, respectively.
W. R. Thissell +3 more
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On Representation of Damage Evolution in Continuum Damage Mechanics
International Journal of Damage Mechanics, 1997The effect of damage patterning on elastic moduli and damage evolution in ideal brittle cracked solids is examined. Key limitations associated with typical continuum damage mechanics approaches are addressed. Critical shortcomings arising from the use of spatially-averaged damage descriptors in the evaluation of effective moduli and thermodynamic ...
T. E. Lacy +3 more
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