モードIII弾塑性破壊靭性値の評価法に関する研究

書誌事項

タイトル別名
  • Study on Mode III Fracture Toughness Testing Method using Uniaxial Testing Machine.
  • モード 3ダン ソセイ ハカイジンセイチ ノ ヒョウカホウ ニ カンスル ケンキュウ

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抄録

The mode III fracture toughness testing method using single axis testing machine is developed.Four point shear specimen is used with small amount of mode I loading to avoid the contact of crack surfaces.The shape of the specimen, and the amount of mode I loading are determined based on the three dimensional FEM analysis.The crack tip stress field is also obtained, and compared with the HRR(Hutchinson-Rice-Rosengren)singularity.The conventional equation to evaluate the J-integral by the load-displacement record is proposed and the accuracy of this equation is verified.Finally the mode III fracture toughness, J IIIC, of aluminum alloy and A 533 B steel are obtained.

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