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An exponential ductile continuum damage model for metals

✍ Scribed by S. Chandrakanth; P. C. Pandey

Publisher
Springer Netherlands
Year
1995
Tongue
English
Weight
765 KB
Volume
72
Category
Article
ISSN
1573-2673

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✦ Synopsis

In the frame of continuum damage mechanics an isotropic ductile plastic damage model is derived. The model is based on void damage variable, defined using effective stress concept and thermodynamics. The damage evolution from this model is exponential with equivalent plastic strain as experienced in some low carbon steel like AISI 1015. The damage model is sensitive to stress triaxiality and emulates the damage evolution as recorded in experiments conducted on such metals. The model is validated by comparison with the Rice-Tracey model and other experimental results published in the literature. This model can be used to study the growth and coalescence of micro voids, influence of stress tfiaxiality on strain to rupture and crack initiation phenomena.

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