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Modeling of continuum damage for application in elastic-viscoplastic constitutive equations

✍ Scribed by S.R. Bodner; K.S. Chan

Publisher: Elsevier Science
Year: 1986
Tongue: English
Weight: 668 KB
Volume: 25
Category: Article
ISSN: 0013-7944
DOI: 10.1016/0013-7944(86)90034-2

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✦ Synopsis

A procedure is described for including isotropic and directional damage as ioad-historydependent softening variables in a set of elastic-viscoplastic constitutive equations. The evolution equation proposed for isotropic damage integrates to an exponential form for the case of constant stress, Directional damage is represented as a second-order symmetric tensor with a scalar effective value used in the constitutive equations. A method is proposed for treating directional damage in the case of non-propo~ion~ loading histories. Comparisons are given of uniaxial creep test results for an alloy at high temperatures with calculations based on the constitutive equations with the inclusion of isotropic damage.

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