1986 Volume 52 Issue 476 Pages 1034-1042
The local J-vector, Jlocal, can be defined for three-dimensional cracks at any point on a crack front. The numerical determination of the J-value along the crack front is usually based this expression of Jlocal. The authors have previously proposed an alternative method, i.e. the global J-scalar method, for determining the J-distribution along the crack front. In this paper, elastic and elastic-plastic stress-strain and J-integral analyses were performed for center-cracked panels and plates with semi-circular surface cracks, by combining three-dimensional FEM techniques with the global J-scalar method. The J-distribution was expressed by a series of functions. It was found that good accuracies can be obtained if suitable functions are selected for the description of the J-distribution. The global J-scalar method was rather insensitive to intrinsic numerical errors involved in the FEM calculations, as compared with the usually employed local J-vector method, and is thought to be a promising J-evaluation method.
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A
Transactions of the Japan Society of Mechanical Engineers Series C
Transactions of the Japan Society of Mechanical Engineers Series B
