Determination of Mechanical Properties for Coating Layer of Galvannealed Sheet Steel using Nano-indentation and FEM

나노인덴테이션 시험과 유한요소해석을 이용한 합금화 온도별 GA강판의 코팅층 체적 거동 결정

In the modern days, a galvannealed sheet steel(GA) instead of a cold rolled steel sheet has been widely used as an alternative to extend the life of automotive body. Accordingly, the mechanical properties of GA for automobiles were taken Into account and studied by comparing with the temperature variation on annealing in this study. To clarify the effect of surface features in the mechanical properties of GA, the several tests such as nanoindentation and FE-analysis were executed. For this goal use is made of the method of neural networks. The developed neural networks apply also to obtain reliable mechanical properties of the thin films. Load-displacement curve was computed by the analysis procedure and compared with experimental results.