Y. Lei et Bk. Neale, J-INTEGRAL FUNCTION FOR A CENTER-CRACKED TENSILE SPECIMEN, International journal of pressure vessels and piping, 71(2), 1997, pp. 129-138
The equation which relates J to the area measured between the load v c
rack mouth opening displacement (CMOD) and the secant offset Line in a
centre-cracked tensile (CCT) specimen is investigated in this paper.
The limits of the equation are evaluated for a range of power law hard
ening material behaviour using data given in the EPRI Handbook. Compar
ison with finite element results confirms that the equation gives good
agreement with J contour integral values for crack length to specimen
width ratios (0.25 less than or equal to a/w less than or equal to 0.
75) of practical interest and a wide range of material behaviour. (C)
1997 Elsevier Science Ltd.