3-D finite element analysis of cyclic deformation at the front of a stationary crack (original) (raw)

Elsevier eBooks, 1995

Abstract

Publisher Summary This chapter analyzes the deformation behavior and the stress–strain field existing near the front of a stationary crack under cyclic loading to predict the site of fatigue crack initiation. 3D elastic–plastic finite element model is developed to simulate the deformation behavior of a stationary crack under cyclic loading. Relevant kinematic parameters corresponding to loading–unloading–reloading phases of a cycle were computed and correlated. The variation of stresses and strains through the plate thickness was analyzed. The monotonic and cyclic crack tip plastically deformed zones and opening displacements both at the surface and at the midsection of the plate were compared with 2D finite element analyses under plane stress and plane strain conditions. The plastic zone size from the 3D analysis for both the specimen surface and the specimen interior is bounded by its 2D plane stress and plane strain calculations.

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