|제목(국문)||고강도강 차체 박판부품 프레스성형 CAE의 예측 정확도 고찰|
|제목(영문)||Investigation of the Prediction Accuracy for the Stamping CAE of Thin-walled Automotive Products|
김세호 (Seho Kim ,대구대학교 자동차ㆍ산업ㆍ기계공학부 ) ▷공저자네트워크등록하기
노재동 (N.J.D ,(주)화신 기술연구소 ) ▷공저자네트워크등록하기
In the current study finite element forming analysis is performed to understand the final geometric accuracy limitations for the stamping of an automotive S-rail from four different steel sheets having tensile strengths of 340MPa, 440MPa, 590MPa and 780MPa. Comparisons between the analysis and the experiments for both springback and formability as measured by the amount of edge draw-in and the thickness distribution were conducted. The springback modes were classified according to a scheme proposed in the current investigation and the error was calculated using the normalized root mean square error method. While the analysis results show fairly good agreement with the experimental data for deformation and formability, the simulation accuracy is lower for predicting wall curl, camber and section twist as the UTS of steel sheet increases.
|keyword||High Strength Steel Sheet, CAE, Prediction Accuracy, Springback