S-레일 시험을 통한 자동차용 판재의 스프링백 특성 평가 = Evaluation of the Springback Characteristics for Automotive Steel by the S-Rail Forming Test

다국어 초록 (Multilingual Abstract)

This study is aimed to evaluate the springback characteristics of automotive steel sheets through the S-rail forming test and to find the process condition under which springback can be reduced. Die set for the S-rail test has been made according to the dimension of the NUMISHEET ’96 benchmark model. Experiment and finite element analysis have been performed on two kinds of automotive steel sheets: mild steel, SPCEN and high strength steel, SPRC.
The test results show that the amount of springback is larger on the high strength steel SPRC than on the mild steel SPCEN, and decreases with increasing black holding force as the case of material flow. And the reduction of friction has the effect of lowering the blank holding force in view of punch force and material flow. It is shown that the strain distribution over the whole specimen and along the specified sections calculated from the finite element analysis coincides with the measured data except local differences.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. 실험
• 3. 유한요소해석
• 4. 결론
• 참고문헌