T{sub {epsilon}}{sup *} integral under plane stress crack growth

Conference · Mon Dec 01 04:00:00 EST 1997

OSTI ID:544218

Omori, Yoshika; Ma, Leong; Kobayashi, A S ^[1]; Okada, Hiroshi; Atluri, S N ^[2]

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1. Univ. of Washington, Seattle, WA (United States). Dept. of Mechanical Engineering
2. Georgia Inst. of Tech., Atlanta, GA (United States). Computational Modeling Center

The T{sub {epsilon}}{sup *} integral values associated with stable crack growth in A606 HSLA steel single-edge-notched (SEN) specimens were determined experimentally and numerically. The displacement fields obtained through Moire interferometry and elastic-plastic finite element analysis were used to evaluate T{sub {epsilon}}{sup *} associated with the moving crack tip. T{sub {epsilon}}{sup *} decreased with the reduction in the size of the integration contour, {Gamma}{sub {epsilon}}, and continually increased with stable crack growth in this specimen. The measured and computed crack-tip opening angle (CTOA), on the other hand, was a constant 15{degree} during stable crack growth after dropping from the measured and computed initial high values of 35 and 57{degree}, respectively.

• OSTI ID: 544218
• Report Number(s): CONF-950618--
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CALCULATION METHODS
CRACK PROPAGATION
ELASTICITY
LOW ALLOY STEELS
PLASTICITY
STRESS ANALYSIS