ＣＴ試験片の弾塑性解析とＪ積分評価

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書誌事項

タイトル別名
  • J Integral Evaluation of CT Specimen in Elastic-Plastic State
  • CT シケンヘン ノ ダンソセイ カイセキ ト J セキブン ヒョウカ

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CT specimens are analyzed elastic-plastically by the 3 dimensional finite element method and the distributions of the 3 dimensional J integral along the crack front are obtained. For 1CT specimens without side groove, the J value at the center of the plate is the maximum and the minimum near the surface. It is shown that the change of both values becomes smaller by introducing the curved crack front assuming the fatigue precrack. For the side grooved specimen, the experimental J value using the net thickness is better than that by using the effective thickness. It is shown that the J value is nearly equal along the crack front for 25% side grooved specimen. For every cases, the J value obtained by the load versus displacement curve coincides well with the average J value over the plate thickness.

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