Abstract
In this study, quasi‐static crack initiation under mixed mode loading in planar (2‐D) functionally graded materials is presented. First, crack initiation in the homogeneous material which forms the basis of our FGM—polyethylene—is studied. The Generalized Maximum Tangential Stress Criterion (GMTS) is applied through use of finite elements to determine crack initiation angles in a cracked 2‐D functionally graded material. The effects of crack length, T‐stress, inherent length scale rc and mode mixity are discussed. Computational results of crack initiation angles are compared to experimental results obtained using functionally graded polyethylene. Stress Intensity factors for a center cracked FGM are calculated.
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