2029 ハイブリッドポテンシャルを用いた鉄ナノ多結晶体中のき裂進展挙動の分子動力学解析(J01-1 材料や構造の破壊/損傷/マルチスケール解析(1),J01 材料や構造の破壊/損傷/マルチスケール解析)

概要

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In recent years, nano-crystalline materials have attracted many researchers' attention, but the fracture mechanism has not been fully clarified. In a molecular dynamics (MD) simulation, grain size and crystal orientation can be chosen, and their effects on the mechanical properties of nano-crystalline materials can be evaluated clearly. However, the accuracy and computational time of MD simulation depends on its interatomic potential. In our previous research, it is confirmed that the Hybrid potential method, which connects FS potential and MEAM potential by the use of Handshake method, provide the high reliable results in short computational time. In this paper, the crack growth behavior analysis in nano-crystalline Fe by the use of Hybrid potential is demonstrated, and the grain-size and strain-rate dependency of fracture behavior is clarified.
社団法人日本機械学会の論文
2006-09-15