期刊
ENGINEERING FRACTURE MECHANICS
卷 71, 期 4-6, 页码 557-566出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0013-7944(03)00038-9
关键词
gradient theory; thermomechanics; thermodynamics; localisation; strain softening
类别
This work demonstrates how gradients of internal state variables can be used in a set of internal variables when the thermomechanics of internal state variables is utilised. This is done by introducing a thermal internal variable called specific dissipative entropy. The gradient term in a material model can be used to avoid localisation. A material model showing Hookean deformation and creep is evaluated. Damage affects the Hookean response. The damage evolution equation contains a Laplacian of damage being introduced to avoid localisation of damage and mesh-dependence of a finite element solution. The material model satisfies the Clausius-Duhem inequality. (C) 2003 Elsevier Ltd. All rights reserved.
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