A Continuous Damage Mechanics Model for Ductile Fracture

[+] Author and Article Information
Jean Lemaitre

Laboratoire de Mécanique et Technologie, E.N.S.E.T/Université Paris 6/C.N.R.S., 94230 Cachan, France

J. Eng. Mater. Technol 107(1), 83-89 (Jan 01, 1985) (7 pages) doi:10.1115/1.3225775 History: Received March 31, 1983; Online September 23, 2009


A model of isotropic ductile plastic damage based on a continuum damage variable, on the effective stress concept and on thermodynamics is derived. The damage is linear with equivalent strain and shows a large influence of triaxiality by means of a damage equivalent stress. Identification for several metals is made by means of elasticity modulus change induced by damage. A comparison with the McClintock and Rice-Tracey models and with some experiments is presented for the influence of triaxiality on the strain to rupture.

Copyright © 1985 by ASME
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