유한요소 극한해석을 이용한 굴곡을 가진 박판부재의 단면비에 따른 붕괴특성 평가

Abstract

This paper is concerned with collapse characteristics and an energy absorption capacity for thin-walled structures with curved shape with respect to aspect ratio of cross-section. The energy absorption capacity influence on yield strkorth and geometric shape such that shape of cross-section and thickness. S-rails with several aspect ratio of rectangle cross-section are selected for thin-walled structures with curved shape. The analysis of an S-rail has been carried out using finite element analysis for evaluation of collapse characteristics. For collapse analysis of an S-rail, a limit analysis formulation with shell element has been derived and a contact scheme has been considered. Collapse analysis has been carried out for an S-rail with several rectangle cross-section and the energy absorption ratio with respect to aspect ratio of cross-section is calculated. From this result, references for fundamental design have been shown for thin-walled structures with curved shape.