Results 251 to 260 of about 1,232,743 (307)
Acoustic emission characteristics and damage evolution of different rocks under uniaxial compression conditions. [PDF]
Sci RepOu J, Wang E, Wang X, Wang B, Zhu G.
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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, Chunsheng Qiao
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The Evolution of Damage Control Surgery
Surgical Clinics of North America, 2012The philosophy of damage control surgery has developed tremendously over the past 10 years. It has expanded outside the original boundaries of the abdomen and has been applied to all aspects of trauma care, ranging from resuscitation to limb-threatening vascular injuries.
John, Chovanes +2 more
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Anisotropic damage law of evolution
European Journal of Mechanics - A/Solids, 2000A formulation for anisotropic damage is established in the framework of strain equivalence. The model involves two elastic parameters of the virgin, initially isotropic material, five parameters for damage, and three additional parameters for low-cycle fatigue, high-cycle fatigue and fracture in tension.
Lemaitre, Jean +2 more
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On finite damage: ductile fracture-damage evolution
Mechanics of Materials, 1985Abstract The tensorial entities pertaining to the presence of a damage zone within a representative material sample are obtained from the micro-macro transition of kinematic quantities in finite deformation. It is shown that they reduce to a ‘small-damage’ tensor as the finite deformation measures reduce to their common infinitesimal counterpart ...
A. Dragon, A. Chihab
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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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Genetic Damage, Mutation, and the Evolution of Sex
Science, 1985The two fundamental aspects of sexual reproduction, recombination and outcrossing, appear to be maintained respectively by the advantages of recombinational repair and genetic complementation. Genetic variation is produced as a by-product of recombinational repair, but it may not be the function of sexual reproduction.
H, Bernstein +3 more
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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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Gradient concepts for evolution of damage
Mechanics of Materials, 1999Abstract While low-order measures of damage have sufficed to describe the stiffness of bodies with distributed voids or cracks, such as the void volume fraction or the crack density tensor of Vakulenko, A.A., Kachanov, M., 1971. [Inz. AN SSSR., Mekhanika Tverdogo Tela (Mech.
Thomas E. Lacy +2 more
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An insight to formation damage evolution
Journal of Petroleum Science and Engineering, 2022Abstract Formation damage can significantly defer hydrocarbon production. Formation damage is one of the key parameters used to evaluate the quality of various operations during the life of a well. The evolution of formation damage over time is rarely studied.
Sofiane Bellabiod +3 more
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