정하중실험을 이용한 확관형 충돌에너지 흡수부재에 관한 연구

초록

The expansion tube is widely used as the module type crash energy absorber, especially in the railroad industry. The feature of the expansion tube is characterized by uniform load level during compression in the longitudinal direction because the crash energy is absorbed by means of expanding the tube in the radial direction. Since the uniform load remains in sudden impact load, the expansion tube is effective to decrease acceleration of passengers when the train accident occur. The expansion tube should not be buckled under the any loads in the longitudinal direction during absorbing the crash energy.