Results 211 to 220 of about 289,419 (268)

The Evolution of Damage Control Surgery

Surgical Clinics of North America, 2012
The 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, Jeremy W, Cannon, Timothy C, Nunez   +2 more
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On finite damage: ductile fracture-damage evolution

Mechanics of Materials, 1985
Abstract 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, 1997
The 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, D. L. McDowell, P. A. Willice, Ramesh Talreja   +3 more
openaire   +1 more source

Genetic Damage, Mutation, and the Evolution of Sex

Science, 1985
The 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, H C, Byerly, F A, Hopf, R E, Michod   +3 more
openaire   +2 more sources

Evolution of DNA damage in irradiated cells

Journal of Mathematical Biology, 1992
Ionizing 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., Sachs, R. K., Hlatky, L. R.   +2 more
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An insight to formation damage evolution

Journal of Petroleum Science and Engineering, 2022
Abstract 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, Abdelhakim Deghmoum, Abdelkader Aris, Ozgur Karacali   +3 more
openaire   +1 more source

Damage evolution and damage model validation in spalled tantalum

Le Journal de Physique IV, 2000
The 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, A. K. Zurek, D. A.S. Macdougall, D. Tonks   +3 more
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Thermodynamics Theory for Damage Evolution in Solids

2014
In this chapter the thermodynamic theory behind damage mechanics is presented. The presented damage evolution model is purely physical, rather than empirical. Entropy production rate is used as a damage metric.
Basaran, Cemal, Nie, Shihua, Gomez, J., Gunel, Eray, Shidong Li, Minghui Lin, Hong Tang, Chengyong Yan, Wei Yao, Hua Ye   +9 more
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Gradient concepts for evolution of damage

Mechanics of Materials, 1999
Abstract 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, David L. McDowell, Ramesh Talreja   +2 more
openaire   +1 more source

Damage Evolution in Ductile Materials

International Journal of Damage Mechanics, 1996
A 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
openaire   +1 more source