Author(s)

G. Shen, W.R. Tyson and A.G. Glovef

Abstract

J estimation for single-edge-notch tension specimens subjected to fixed-grip loading G. Shen\ W. R. Tyson* and A. G. Glovef ' Materials Technology Laboratory, CANMET, Canada * TransCanada Pipelines Ltd., Canada Abstract Two-dimensional plane strain finite element analyses have been used to develop J estimation equations for single-edge-notch specimens subjected to fixed-grip tensile loading from experimentally measured quantities, notably area under load vs. plastic load line displacement (A^LD ) and area under load vs. plastic crack mouth opening displacement (A^Moo )• It was found that J estimation from A^MOD is much more reliable than from A^LD since dependence on strain hardening coefficient is much reduced in the former case. 1 Introduction In the standardized procedures for fracture toughness testing, such as ASTM 813 and ASTM 1290, the J-integral of a three-point bend (SENB) specimen is estimated by using area under load vs. plastic load line displacement (A^LD ) in the f

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