112 3次元応力問題に対するコースティック像シミュレーションの適用(OS2-(2)オーガナイズドセッション《材料強度と構造設計》)

概要

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The method of the caustics is well known as a technique to measure the stress intensity factor. In this method, numerical simulation of the caustic image is necessary to evaluate the stress intensity factor. Since the plane stress state has been assumed in previous studies, experimental result doesn't coincide with the theoretical one when the caustic image is delivered from the vicinity of the crack tip. In such case, the caustic image becomes smaller than the theory in which plane stress is assumed. Accordingly, we developed a new simulation system of the caustic image for 3D stress field coupled with 3D FEM analysis. Our system could provide the caustic image that met experiment even the caustic image delivered from vicinity of the crack tip. Furthermore, we could obtain the image better agreed with the experiment, when we consider the stress distribution through the thickness direction in detail.
一般社団法人日本機械学会の論文
2011-08-26