三次元多結晶体モデルを用いたクリープキャビティ発生成長シミュレーション(<小特集>材料のミクロ・メゾ評価)

概要

論文の詳細を見る
Computer simulation of creep cavity behaviour in polycrystalline metal was attempted. In this model, Voronoi's polyhedrons were looked upon as a polycrystalline metal and thier facets were upon as grain boundaries. The values of grain-boundary sliding and normal stress were assigned to the each grain by their respective distribution functions which depended on the direction of the facet. The damaged grain boundary was defined as the facet whose sliding value and stress value were greater than critical values respectively. The nuclei of cavity were generated on the damaged grain boundaries and the number was decided by an exponential function of the normal stress of each facet. Cavity size was calculated by a differential equation of time under the influence of the normal stress. The result of the simulation with proper distribution function and material constants shows good agreement with the result of experiment.
一般社団法人日本機械学会の論文
1999-03-25