SYMPOSIA PAPER Published: 01 January 1988
STP27704S

Plasticity Near a Blunt Flaw Under Remote Tension

Source

Elastic-plastic analyses of a group of blunt-tipped crack-like flaws were performed. Elliptical, semicircular, and circular tip geometries were considered. Results show very minor excursions of the plastic zone along the crack faces in contained plasticity, even after the characteristic butterfly shaped crack-tip zone has developed. As a result of this yielding behavior, it was found that stress triaxiality predictions following from slipline theory significantly overestimate the elastic-plastic results. J-integral computations show that there is significant path dependency near the tip, which can be associated with the nonproportional stress histories and partial crack face unloading that was detected. The results should be important in applications of critical stress and J-integral concepts to fracture from crack-like imperfections.

Author Information

Tracey, DM
U.S. Army Materials Technology Laboratory, Watertown, MA
Freese, CE
U.S. Army Materials Technology Laboratory, Watertown, MA
Price: $25.00
Contact Sales
Related
Reprints and Permissions
Reprints and copyright permissions can be requested through the
Copyright Clearance Center
Details
Developed by Committee: E08
Pages: 93–106
DOI: 10.1520/STP27704S
ISBN-EB: 978-0-8031-5064-5
ISBN-13: 978-0-8031-1258-2