SYMPOSIA PAPER Published: 01 January 1986
STP17416S

Plastic Energy Dissipation as a Parameter To Characterize Crack Growth

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The global plastic energy dissipation for crack initiation and slow growth was experimentally determined for monotonic, quasi-static loading conditions utilizing compact tension and three-point bend specimens of HY-130 steel. For non-side-grooved specimens, the global plastic energy dissipation was linear with crack extension. For side-grooved specimens, however, the global plastic energy dissipation R-curves were not linear. Moreover, for non-side-grooved specimens, the values of the global plastic energy dissipation at crack growth initiation and the global plastic energy dissipation rate were found to be dependent on specimen size, geometry, and initial crack length. Although no tests were conducted to determine the sensitivity of side-grooved specimens to size or initial crack length, it was found that, for these specimens, the geometry dependence of the global plastic energy dissipation rate was minimized but not eliminated.

Author Information

Watson, TJ
Naval Research Laboratory, Washington, DC
Jolles, MI
Naval Research Laboratory, Washington, DC
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Developed by Committee: E08
Pages: 542–555
DOI: 10.1520/STP17416S
ISBN-EB: 978-0-8031-4972-4
ISBN-13: 978-0-8031-0472-3