等価体積欠損法の閉合型亀裂問題への適用

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タイトル別名
  • Application of equivalent volume defect method to closed crack problem.
  • トウカ タイセキ ケッソンホウ ノ ヘイゴウガタ キレツ モンダイ エ ノ テ

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抄録

Equivalent Volume Defect Method (EVDM) is one of useful methods to estimate the deformation behavior of discontinuous materials but its application is limited in the open crack problem. In this paper, EVDM is expanded as it can apply to the closed crack problem.<BR>Deformability of the elastic body which contains a single closed crack is analyzed in consideration of frictional sliding on the crack surface. It is made clear that Equivalent Volume Defect for a closed crack is expressed as a function of the crack length, the crack orientation, the frictional coefficient on the crack surface and the applied stress. Based on this expression, the elastic compliance of the solid which contains closed cracks is simply evaluated in the same manner as that of open cracks.<BR>To examine the applicability of the proposed method, model calculations are carried out. The results obtained by the proposed method agrees fairly well with that by Displacement Discontinuity Method, hence it is confirmed that the proposed method gives a good approximation for deformability of the materials which contains closed cracks. Furthermore, EVDM can also apply to the deformability analysis of the material which contains both of open and closed cracks.

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  • 資源と素材

    資源と素材 106 (3), 133-138, 1990

    一般社団法人 資源・素材学会

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