Authors - K. Vinayagar, A. Senthil Kumara, R. Sridhara, M. Vel Vignesha, K. Gokulana
Abstract : This work reveals the interaction effect on energy absorption of bi-tubular, a combination of outer circular tube with inner polygonal tube structures under quasi-static axial crushing. First, the experimental mean crushing force of single tubes was compared with theoretical prediction and it witness good agreement between them. In bi-tubular arrangement, the inscribed diameter of inner polygonal tubes plays an important role in improving the mean crushing force by interaction effect. The mean crushing force of bi-tubular specimens D3T, D3S and D3H have 35, 26, 10.1 percentage higher than the summation of their individual single tubes that is SC with S3T or S3S or S3H. Keywords : bi-tubular structures, quasi-static axial crushing, interaction effect, mean crush force, specific energy absorption.