Journal Published Online: 22 January 2013
Volume 41, Issue 2

A Study on the Fitting Accuracy of CMOD Compliance Equations

CODEN: JTEVAB

Abstract

The maximum error of the inverse fitting of Tada et al.’s equation of the a/W–crack mouth opening displacement (CMOD) compliance equation proposed by Joyce and adopted in ASTM E1820-11 for single edge bend [SE(B)] specimens with shallow cracks (0.05 ≤ a/W < 0.45) is observed to be 2.03 % for 0.05 < a/W < 0.1. A new a/W–CMOD compliance equation with the same fifth-order polynomial fitting applicable for SE(B) specimens with 0.05 ≤ a/W ≤ 0.7 is therefore proposed. The maximum fitting error of the proposed equation is approximately 0.19 %.

Author Information

Wang, Enyang
Dept. of Civil & Environmental Engineering, Western Univ., London, ON, CA
Zhou, Wenxing
Dept. of Civil & Environmental Engineering, Western Univ., London, ON, CA
Shen, Guowu
CANMET Materials Technology Laboratory, Natural Resources Canada, Hamilton, ON, CA
Pages: 3
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Stock #: JTE20120213
ISSN: 0090-3973
DOI: 10.1520/JTE20120213