Special Issue on Fracture Mechanics. Development of a Simplified J-Estimation Scheme Based on the Reference Stress Method.

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  • 破壊力学　参照応力法によるＪ積分簡易評価法の開発
  • サンショウ オウリョクホウ ニ ヨル J セキブン カンイ ヒョウカホウ ノ

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Non-linear fracture mechanics is one of the most effective approaches for the integrity assessment of high temperature components. J-integral is a feasible parameter to represent fracture behavior in the non-linear regime. However, there are many difficulties in calculating an accurate value of J-integral in actual components. Some simplified methods have been proposed to estimate the J-integral, and applicability of those methods has been recognized. Although J-estimation scheme based on the reference stress method has an advantage to be applicable to many problems, the method has not been established yet. This paper presents a detailed procedure and applications for ductile fracture, creep-fatigue inhomogeneous and three-dimensional problems.

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