Continuum Damage Mechanics and Numerical Applications by Wohua Zhang

By Wohua Zhang

Continuum harm Mechanics and Numerical purposes provides a scientific improvement of the speculation of Continuum harm Mechanics and its numerical engineering functions utilizing a unified type of the mathematical formulations in anisotropic and isotropic harm types. The theoretical framework is predicated at the thermodynamic concept of power and fabric dissipation and is defined via a suite of basic formulations of constitutive equations of broken fabrics, improvement equations of the broken nation, and evolution equations of micro-structures. in response to thoughts of damage-dissipation of the fabric kingdom and powerful evolution of fabric houses, some of these complex equations, which take nonsymmetrized results of wear points under consideration, are built and transformed from the normal common failure versions so that they are extra simply utilized and tested in quite a lot of engineering practices by means of experimental trying out. Dr. Wohua Zhang is a Professor at Engineering Mechanics study middle in Zhejiang college of China. Dr. Yuanqiang Cai is a Professor at division of Civil Engineering in Zhejiang college of China.

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This is in 30 2 Review of Damage Mechanics contrast to the experimental work of Tapponier and Brace [2-231]' which has conclusively shown that dilatancy arises as a consequence of micro-cracking, not plastic flow. To improve on the perceived shortcomings of the bi-surface models, the work of Yazdani and Schreyer [2-232] offers an alternative and realistic description for the damage surface. This is accomplished by means of particular kinetic relations that are postulated. Their damage model allows the prediction of dilatancy as a result of micro-cracking and introduces a distinction between elastic and inelastic damage.

In : Proceedings of the ICF-6. 533-551 (1982) . , Damage waves in elastic-brittle materials. In: Proceedings of the IUTAM Symposium on Rheology of Bodies with Defects. 1 79-190 (1999) . [1-31] Vala ppan S. , Anisotropic damage problems of rock mass. In: Proceedings of the NUMETA 90 , Swansea, Wales (1990). , Finite element analysis of anisotropic damage mechanics problems. J . Eng. Fract. , 35(6) , 1061-1076 (1990) . , Valappan S. , Elastic constitutive relation for an anisotropic damage model.

Damage variable). Frantziskonis and Desai [2-239] presented an elasto-plastic ductile damage constitutive model for strain softening of geological materials. Some recent results dealing with constitutive models for ductile damage can be found in [2-242"-'246]. For composite elasto-plastic ductile damage, Ju et ai. [2-240] provided a model of composites with an evolutionary complete fiber debonding effective elasto-plastic ductile damage mechanism for fiber-reinforced materials. 4 Constitutive Models for Damage due to Super-Plastic Void Growth Super-plasticity can be observed for some metals with fine grain size «10 mm) deforming at an appropriate strain rate and temperature [2-247, 2-48].

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