On Fracture Analysis Using an Element Overlay Technique
In this paper, a simple but highly accurate analytical method to evaluate stress intensity factors based on an element overlay technique is presented. When a crack exists in a structure, we need to analyze its global deformation as well as local deformation field around the tip of the crack. This naturally leads us to a consideration on some kind of multi-scale analysis strategies. Thus, we adopt the element overlay technique (S-FEM) which is a kind of multi-scale methodologies. In this paper, we present i) numerical implementation of element overlay technique (S-FEM), ii) method to calculate stress intensity factors (virtual crack closure-integral method, VCCM), iii)accuracies of evaluated stress intensity factors and iv) some discussions.
Kikuo Kishimoto, Masanori Kikuchi, Tetsuo Shoji and Masumi Saka
H. Okada et al., "On Fracture Analysis Using an Element Overlay Technique", Key Engineering Materials, Vols. 261-263, pp. 681-686, 2004