304-Stainless 극박판을 이용한 Corrugated 형 금속 샌드위치 판재의 최적 비 강성 설계 연구

Metallic sandwich plate shows high stiffness, cost-effectiveness, thermal property. In this study, the geometry of the corrugated metallic sandwich plate with ultra-thin 304 stainless steel sheets was studied using analytic models and finite element analysis. There are four failure modes (face yielding, face buckling, core yielding and core buckling) in the corrugated metallic sandwich plate. Through theoretical formulas, the failure modes and cricical loads under longitudinal loading of the metal sandwich panels were analyzed. Optimal designs were determined based on failure maps derived from analytic models. Additionally, structures exhibiting maximum specific stiffness were designed based on a dimensionless load criterion (Ψ=0.0083). The load-displacement curves and failure modes obtained from ABAQUS simulations were compared and validated against these theoretical predictions.