Damage-Coupled Creep Mechanics and its Structural Analysis Principle

[+] Author and Article Information
Pan Zeng

Department of Mechanical Engineering, Tsinghua University, 100084 Beijing, P.R. China

X. F. Sun

Institute of Applied Mechanics, Southwest Jiaotong University, 610031 Chengdu, Sichuan, P.R. China

J. Appl. Mech 62(3), 640-645 (Sep 01, 1995) (6 pages) doi:10.1115/1.2895994 History: Received March 17, 1992; Revised September 06, 1993; Online October 30, 2007


Continuum damage mechanics (CDM) is considered as a general method to treat the progressive deterioration of materials and structures in the framework of continuum mechanics. The damage-coupled creep mechanics based on CDM is discussed in the paper first, including the description of effective stress concept and the expression of all field equations in creep. The general formulation of a constitutive relation is presented after simplifying treatment for the sake of the modeling of creep damage problem in computational mechanics. The parametric variational principle (PVP) developed from the idea of optimal theory is introduced to establish the numerical principle of structural analysis for damage-coupled creep mechanics, including both the associated potential variational principle and the corresponding FEM formulations. The possibility of applying the principle presented by this paper to the life and damage prediction of structural components is finally illustrated by some examples on creep experiments for three kinds of materials.

Copyright © 1995 by The American Society of Mechanical Engineers
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