ISSN: 1945-7553
CODEN: JTEVAB
Page Count: 3

Plastic η and γ Factors for Compact Tension Specimen in J-Integral Estimation

Hu, JM
University of Maryland, College Park, MD

Albrecht, P
University of Maryland, College Park, MD

(Received 16 March 1990; accepted 5 September 1990)

Abstract

The empirical expressions for the plastic η and γ factors adopted by ASTM in the standard test methods for J_lc and J-R curve testing (E 813 and E 1152) were determined from the results of experimental work. This note proposes instead expressions of η_p and γ_p that are derived from a limit load solution. The results show that over the range of crack lengths recommended for testing in the ASTM standard test methods, a/W = 0.5 to 0.75, the proposed η_p value is 5.11 to 1.42% greater than the ASTM value, and the proposed γ_p value is 12.93 to 5.82% greater.

Keywords:
J-integral, J-R curve, C(T) specimen, η factor, γ factor, limit load

Paper ID: JTE12549J
DOI: 10.1520/JTE12549J
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