Transformation of CTOD delta(5) to CTOD delta(BS) and J-integral for 3PB-and CT-specimens

A two-region empirical formula is proposed for the transformation of crack tip opening displacement (CTOD) delta(5) to the standard CTOD delta(BS) and the J-integral. Coefficients of the approximation are fitted to data sets of three-dimensional elastic-plastic finite element solutions for plane sid e and side-grooved three-point bend and compact tension specimens. Solution parameters include also specimen size, crack front curvature and strain ha rdening of the material. The transformation of delta(5) to delta(BS) and J is implemented as a Java applet, which can be used remotely with the help o f Web browser. A window for equality between CTOD delta(5) and CTOD delta(B S) was defined. (C) 1999 Elsevier Science Ltd. All rights reserved.