Studies on Geometrical Featured Metallic Shell Structures for Inward Inversion

The geometrical inward inversion studies were planned on the metallic shell geometries. These geometries are circular in shapes. They are closed at the top and open at the bottom. In between top and bottom faces, the geometrical features are changed from sample to sample. Feature changes are in shape, apical angle, steps, thickness etc. Studies were made to see how these features play role in inversion process of large deformation. Force stroke graphs were plotted for featured samples and discussed in details for deformation characteristics. Comparative analysis is done for samples in context to energy absorption. The analytical simulations were also done for experiments. Good correlations were found with experimental results. The parameters which could not be obtained physically could be simulated analytically for parametric studies. This paper also gives a guide line on parameters to be taken for good energy absorption, in inward inversion process.