クリープ破壊に対する局所的解析法の有限要素依存性

概要

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Mesh dependence of local approach for creep crack growth analysis of a perforated plate without initial stress singularity was investigated. According to the results of calculations using various finite, element meshes, it was observed that the effects of the element types and mesh patterns were insignificant, and the creep crack growth rates showed significant dependence on the size of crack tip elements. The essential cause of this mesh dependence was attributed to the different stress concentrations in front of the growing crack (or the completely damaged zone) for different mesh sizes. The effects of elastic-damage coupling on the mesh dependence were also examined. Finally, a simple stress limitation method based on ideal plastic deformation was proposed to regularize the mesh dependence of crack growth analysis, and was shown to be an effective method for this purpose.
一般社団法人日本機械学会の論文
1995-09-25