T*ε integral analysis of aluminum specimens

Yoshika Omori, Albert S. Kobayashi, Satya N. Atluri, Hiroshi Okada, Paul Tan

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

T*ε-integral values associated with stable crack growth in thin 2024-T3 aluminum single edge notched (SEN), central notched (CN) and compact (CT) specimens were evaluated experimentally and numerically along a near-crack contour. Γε. which elongated with crack extension. The surface displacement fields, which were determined by Moiré interferometry and by an elastic-plastic finite element (FE) simulation of the measured stable crack growth, were used to determine the Γ*ε through an equivalent domain integral method. The experimentally and numerically determined T*ε's, as well as the crack tip opening displacements (CTOA). were in excellent agreement through a stable crack growth in excess of Δa = 4 mm. T*ε for the SEN and CN specimens coincided while T*ε for the CT specimen was lower. These results, which are similar in trend with the fracture toughness measurements, suggest that T*ε for a given Γε could be a material property which characterizes stable crack growth .

Original languageEnglish
Pages (from-to)281-286
Number of pages6
JournalAmerican Society of Mechanical Engineers, Aerospace Division (Publication) AD
Volume52
StatePublished - 1996

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