Seminar
| Date | 2025-03-11 |
|---|---|
| Time | 16 : 00 |
| Title | Nanomechanical modeling of defect-driven plasticity and failure in Metallic Nanostructures |
■ 제 목: Nanomechanical modeling of defect-driven plasticity and failure in Metallic Nanostructures
■ 연 사: 류일 교수 (서울대학교 재료공학부)
■ 일 시: 2025년 3월 11일(화) 오후 4시
■ 장 소: 응용공학동 1층 영상강의실
■ Host : 한승민 교수
■ Abstract : While the detailed defect microstructure and short-range interaction is handled by DD framework, the long-range elastic interactions with image stress field are calculated by FEM (using commercial package (ABAQUS) with user-subroutine), accounting for complex boundary conditions. The proposed model could account for complex multi-physical phenomena, which would play an important role in obtaining a fundamental understanding of deformation mechanism at small scale. Applications of developed concurrent coupled model includes dislocation nucleation at a crack tip, nanoindentation, hydrogen embrittlement at submicron length scale. The developed model will shed light on fundamental investigation of "defect-controlled" mechanical behaviors in crystalline materials, such as plasticity and damage and fracture.. The Nanomechanical defect dynamics model has developed to investigate size-dependent plasticity by coupling conventional continuum finite element (FEM) with a discrete defect (DD) modeling