WIT Press

Crack-initiation Conditions: Extended Neuber Method Coupled To Damage Mechanics

Price

Free (open access)

Paper DOI

10.2495/FR980081

Volume

19

Pages

10

Published

1998

Size

680 kb

Author(s)

R. Desmorat & J. Lemaitre

Abstract

Structural failure often follows the initiation of cracks occurring at corners, free edges or interfaces. Damage mechanics gives quantitative information about such cracking. But when used in a fully coupled manner (with elasticity and plasticity), it leads to costly computations. In order to obtain helpful results for a fast design, following a Finite Element elastic computation, we propose a quick determination of the crack initiation conditions. First, the Neuber method is extended through to the assumption of a proportional loading Then, from previous elasticity calculations and from the knowledge of the plasticity material parameters, the equivalent stress field is obtained It is used as a input into the damage evolution

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