화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Materials Research, Vol.27, No.12, 679-687, December, 2017
DOI10.3740/MRSK.2017.27.12.679  Export Citation
단결정 압축 변형 거동의 변형구배 결정소성 유한요소해석
Strain Gradient Crystal Plasticity Finite Element Modeling for the Compression Behaviors of Single Crystals
정재호, 조경목1, 최윤석1, †
  • 현진소재㈜
  • 1부산대학교 공과대학 재료공학부
Jae-Ho Jung, Kyung-Mox Cho1, and Yoon Suk Choi1, †
  • HYUNJIN Materials Co., Busan 46755, Republic of Korea
  • 1School of Materials Science and Engineering, Pusan National University, Busan 46241, Republic of Korea
E-mail:
A strain-gradient crystal plasticity finite element method(SGCP-FEM) was utilized to simulate the compressive deformation behaviors of single-slip, (111)[101], oriented FCC single-crystal micro-pillars with two different slip-plane inclination angles, 36.3° and 48.7° and the simulation results were compared with those from conventional crystal plasticity finite element method(CP-FEM) simulations. For the low slip-plane inclination angle, a macroscopic diagonal shear band formed along the primary slip direction in both the CP- and SGCP-FEM simulations. However, this shear deformation was limited in the SGCP-FEM, mainly due to the increased slip resistance caused by local strain gradients, which also resulted in strain hardening in the simulated flow curves. The development of a secondly active slip system was altered in the SGCP-FEM, compared to the CP-FEM, for the low slip-plane inclination angle. The shear deformation controlled by the SGCP-FEM reduced the overall crystal rotation of the micro-pillar and limited the evolution of the primary slip system, even at 10% compression.
Keywords:strain gradient;crystal plasticity;slip;single crystal;finite element method
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