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분자동역학을 이용한 나노구조물의 크기와 결정방향에 따른 응력-변형률 관계 해석

Analysis of Stress-Strain Relationship of Nano Structures According to the Size and Crystal Orientation by Using the Molecular Dynamics Simulation

  • 강용수 (서울산업대학교 에너지환경전문대학원) ;
  • 김현규 (서울산업대학교 기계공학과)
  • 발행 : 2008.12.01

초록

In this paper, the molecular dynamics (MD) simulations are performed with single-crystal copper blocks under simple shear and simple tension to investigate the effect of size and crystal orientation. There are many variances to give influences such as deformation path, temperature, specimen size and crystal orientation. Among them, the crystal orientation has a primary influence on the volume averaged stress. The numerical results show that the volume averaged shear stress decreases as the specimen size increases and as the crystal orientation changes from single to octal. Furthermore, the Schmid factor and yield stress for crystal orientation are evaluated by using the MD simulation on the standard triangle of stereographic projection.

키워드

참고문헌

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