An Anisotropic Damage Model for Prediction of Ductile Fracture during Cold-Forging

Researchers have formulated equations of ductile fracture to simulate and predict defects in cold-forged parts, e.g., the Cockcroft–Latham criterion. However, these are not applicable certain cases forged products. This study formulates a new equation for predicting fractures with better prediction accuracy than convention by which cost trial-and-error design can be reduced. The is expressed as second-rank symmetric tensor, inner product stress strain-increment tensors. theoretical efficacy verified via uniaxial tensile test. practicability confirmed applying it simulations two real components: hollow shaft flanged shaft. For shaft, predicts position where would initiate, which—to best authors’ knowledge—is unique this study. occurrence diagonal cracks due different lubrication conditions.