인문학
사회과학
자연과학
공학
의약학
농수해양학
예술체육학
복합학
지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록·키워드
Aluminum wire bonds in power semiconductor packages face high thermal loading, making finite element analysis (FEA) accuracy dependent on reliable temperature-dependent properties. Existing data often rely on discontinuous temperature points and overlook microstructural effects. This study proposes a Materials Studio-based molecular dynamics framework to evaluate the thermo-mechanical properties of pure aluminum using a Mishin EAM potential. Single-crystal and Voronoi polycrystalline models were constructed to analyze cell-size and grain-boundary effects. Following stepwise NVT/NPT equilibration, elastic constants were calculated via a small-strain method, and uniaxial tensile simulations were performed to derive Young’s modulus, Poisson’s ratio, linear thermal expansion coefficient, yield strength, and ultimate tensile strength across 238K to 498K. The single-crystal model revealed cell-size effects in post-peak deformation, while the polycrystalline model exhibited grain-boundary-induced softening at yielding but enhanced strength retention at ultimate tensile strength. Results were averaged and formulated into continuous regression functions. This approach supplements experimental data and provides continuous property inputs for power semiconductor FEA reliability analysis.
본문·목차
인공지능 문자 인식 모델을 통해 추출된 텍스트로, 일부 오타나 오류가 포함될 수 있으나 지속적으로 개선 중입니다.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.