Flat-topped conical shell under axial compression

✍ Scribed by P. Xue; T.X. Yu; X.M. Tao

• Publisher: Elsevier Science
• Year: 2001
• Tongue: English
• Weight: 546 KB
• Volume: 43
• Category: Article
• ISSN: 0020-7403
• DOI: 10.1016/s0020-7403(01)00032-7

✦ Synopsis

Based on experimental observations of a grid-domed textile composite under axial compression, the large deformation mechanisms of a at-topped conical shell are identiÿed. Accordingly, both elastic model and rigid-plastic model are proposed to describe the collapse process and predict the load-displacement characteristics. In the rigid-plastic analysis, the energies dissipated in bending along plastic hinge lines and in stretching of the thin-wall segments between the plastic hinge lines are taken into account. Analytical expressions describing the load-displacement and energy-displacement relationships during the large deformation process are derived. Illustrated by typical numerical examples, the e ects of apical angle of a at-topped conical shell on its energy absorption capacity are revealed. The respective strain distributions on the conical shell resulted from bending deformation and membrane deformation are presented. A good agreement is shown between the theoretical predictions and experimental results.