SYMPOSIA PAPER Published: 01 January 1979
STP34930S

Investigation of Specimen Geometry Modifications to Determine the Conservative - Curve Tearing Modulus Using the HY-130 Steel System

Source

The objective of this work was to investigate the effects of face grooves and crack length variations of JIc and the tearing modulus of HY-130 steel. Compact specimen geometries (1TCT) with crack length ratios of 0.55, 0.65, and 0.8, and face grooves of 12.5 percent and 25 percent total cross section reduction were tested using a computer interactive unloading compliance test technique. Results of these tests showed that for this material, JIc was independent of specimen geometry for the range of geometries evaluated. The tearing modulus, however, was higher in nonface grooved specimens, in which crack tunneling occurred, and the tearing modulus was found to increase by a factor of two as crack length ratios increased from 0.55 to 0.8. In face grooved specimens, the tearing modulus was found to be constant for the various crack length ratios tested, at the lower bound of values developed with nonface grooved specimens.

Author Information

Gudas, JP
David W. Taylor Naval Ship Research and Development Center, Annapolis, Md.
Joyce, JA
United States Naval Academy, Annapolis, Md.
Davis, DA
David W. Taylor Naval Ship Research and Development Center, Annapolis, Md.
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Details
Developed by Committee: E08
Pages: 474–485
DOI: 10.1520/STP34930S
ISBN-EB: 978-0-8031-4746-1
ISBN-13: 978-0-8031-0364-1