113 超細密プレートフィン構造の弾-粘塑性特性に及ぼす積層ずれの影響(OS1-3 微視構造を有する材料の変形と破壊 : シミュレーション)

概要

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In this study, the elastic-viscoplastic properties of ultra fine plate-fin structures with laminate misalignment are investigated using the time-dependent homogenization theory. For this, it is first shown that, even though plate-fin structures have laminate misalignment, the distribution of perturbed velocity in the structures possesses periodicity. It is further shown that, by employing this periodicity as a boundary condition for boundary value problems, a rectangular unit cell defined for a plate-fin structure with no laminate misalignment can be also used as the analysis domain for the homogenization analysis of plate-fin structures with laminate misalignment. The present method is then applied to the analysis of the elastic-viscoplastic behavior and compressibility of ultra fine plate-fin structures made of Ni-based alloy, under uniaxial tension at high temperature. It is shown that the laminate misalignment can significantly affect both the elastic-viscoplastic behavior and compressibility of the plate-fin structures.
2010-10-09