混合モード高速進展き裂のコースティック法理論 : 第1報,面内混合モード理論

概要

論文の詳細を見る
The method of caustics (shadow spot method) has proven to be a powerful optical method to measure stress intensity factors in static and dynamic fracture mechanics problems. In this paper, a theory of caustics was developed for elastodynamically propagating cracks under inplane mixed-mode conditions. Complex potentials for the general solutions of a near-tip field which have been previously derived by the authors were used in this theoretical development. The effects of crack velocity and the mixed-mode condition on the caustic pattern and intial curve were investigated. A new procedure was also proposed for the evaluation of the dynamic stress intensity factors K_I and K_II using appropriate dimensions of the caustic pattern. The method of caustics developed here enables one to study quantitatively various mixed-mode dynamic fracture phenomena such as crack branching, crack curving, and crack kinking.
一般社団法人日本機械学会の論文
1988-05-25