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Modelling of brittle and fatigue damage for elastic material by growth of microvoids

✍ Scribed by J.J. Marigo

Publisher
Elsevier Science
Year
1985
Tongue
English
Weight
980 KB
Volume
21
Category
Article
ISSN
0013-7944

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✦ Synopsis

In the direct macroscopic approach, we present a unified formulation of brittle damage and fatigue damage models for elastic materials. The yield-surface notion is used in the brittle law, but is substituted by the loading-unloading irreversibility concept in the fatigue law. However, the latter contains a bounding surface and possibly an endurance domain. The two laws are compared. In the indirect approach, we construct a physical damage model by the growth of microvoids in an elastic matrix, using the homogenization method. We show how this approach removes some assumptions and empirical features of the direct approach. Finally, we give the numerical results and the model obtained when porosity is the one damage parameter.

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