SEDL / STP / STP1244-EB / STP14628S

Cleavage Fracture Quantified by J and A²

Chao, YJ
Professor and graduate student, University of South Carolina, Columbia, SC

Ji, W
Professor and graduate student, University of South Carolina, Columbia, SC

Pages: 18    Published: Jan 1995

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Abstract

The analytical asymptotic solutions including higher order terms for stresses at a crack tip embedded in a power law elastic-plastic material are applied to the interpretation of cleavage fracture for a mild steel. It is demonstrated that fracture initiation can be determined by using two parameters J and A² — J represents the level of loading and A² quantifies the level of constraint. Constraint related issues such as size effect, transferability, and biaxial stress effect are investigated. The predicted results have the same trend as seen experimentally.