切欠平板引張試験片の弾塑性挙動と破壊特性に関する一考察

概要

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Elasto-plastic behavior for both center notched and side notched plate specimens were studied as a first step toward prediction of fracture. Elasto-plastic analysis by finite element method and brittle coating were used to approach the problem. At each stress level, brittle coating cracks formed at high strain range showing contours of equal strain was in good agreement with the predicted shape using the finite element method. Fracture test results on both center notched and side notched specimens were compared. And they were discussed on the basis of elasto-plastic analysis. From examination of the properties of matrices, it was made clear that a computed result for a given condition of a specimen can directly be applied to obtain solution in different state if. i) geometric similarity exists in specimens. ii) the Young's modulus and strain hardening coefficient are varied while the ratio between the two is kept constant. iii) yield stress is varied in specimens.
社団法人日本船舶海洋工学会の論文