接着継手中のき裂の弾塑性解析　接着剤厚みが破壊靭性値に及ぼす影響の評価

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書誌事項

タイトル別名
  • Elastic-Plastic Analysis of Cracks in Adhesive Joints. Effect of Bond Thickness on Fracture Toughness.
  • セッチャク ツギテチュウ ノ キレツ ノ ダンソセイ カイセキ セッチャクザ

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説明

The evaluation of fracture of a crack in an adhesive joint is important in relation to the structural integrity of adhesive joints and composite materials. It has been reported that the fracture toughness of a crack in a ductile adhesive joint depends on the bond thickness. Although this is an important problem of adhesive structures, the mechanism of the dependence has not yet been elucidated. In this study, the J-integral and the near-tip stress of a crack in an adhesive joint are investigated by elastic-plastic analysis. It is found that the stress field ahead of a crack tip under the mode I load does not depend on the shape of the specimen. In the case of a very thin adhesive layer, a decrease of the bond thickness causes increased stress ahead of the crack tip which results in a decrease of fracture toughness.

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