ENERGIES IN SBV AND VARIATIONAL MODELS IN FRACTURE MECHANICS
ENERGIES IN SBV AND VARIATIONAL MODELS IN FRACTURE MECHANICS
复制标题
SBV 中的能量和断裂力学中的变分模型
DOI:
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发表时间:
2008
期刊:
影响因子:
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通讯作者:
B. A.
中科院分区:
文献类型:
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作者:
A. L.;B. A.
We describe some applications of special functions of bounded variation to problems in fracture mechanics. 1. Free Discontinuity Problems. In the framework of Griffith’s theory of fracture mechanics, the energy necessary to the production of a crack is proportional to the crack surface. If the medium under consideration is hyperelastic and brittle, i.e., the elastic deformation outside the fracture surface can be modeled by the introduction of an elastic energy independent of the crack, then we can consider the problem of the existence of equilibria, under proper boundary conditions, in the framework of the calculus of variations. The simplest energy functional in the isotropic case, the study of whose minima leads to an existence result, takes the form