Author(s)

J. Toribio

Abstract

Application of classical finite element methods to environmentally assisted fracture modelling J. Toribio Department of Materials Science, University of La Coruna, E.T.S. de Ingenieros de Caminos, Campus de Elvina s/n, 15192 La Coruna, Spain ABSTRACT This paper shows the application of classical numerical methods to environmentally assisted fracture (EAF) modelling of metals. Three examples demonstrate the use of the finite element method to model these processes in different ways. The first approach is a chemical model on the basis of hydrogen diffusion. The second is a kinematic model based on the local strain rate computed at the notch tip. The third is a mechanical model of hydrogen damage as a crack or notch. INTRODUCTION Environmentally assisted fracture (EAF) of metals is a transient process which involves both mechanical and chemical phenomena, since the fracture itself depends on the stress level, and the chemical environment exerts an additional influence. In this context

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