SEDL / STP / STP995V2-EB / STP27728S

Kinetics of Fracture in Fe-3Si Steel Under Model I Loading

Bessendorf, MH
Assistant professor, Civil Engineering,,

Pages: 10    Published: Jan 1988

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Abstract

This paper deals with experimental studies of fatigue crack propagation (FCP) in Fe-3Si steel. The FCP experiments were performed on single-edge crack specimens. Results show that an extensive damage zone consisting of slip bands surrounds and precedes the propagating crack. The system of the crack and the damage zone constitutes the crack layer (CL). The results demonstrate that fracture propagates by the translation, expansion, and distortion of the part of CL called the active zone. The contours of the damage distribution show that different loading stresses may cause significantly different shapes of damage. Application of the stability criteria is demonstrated. It was shown that the critical energy release rate depends on the history of loading.