Study on Dynamic Large Deformation Characteriscs of Thin-Walled Ellipsoidal Shells under Blast Loading

The experiment were carried out on the dynamic deformation of metal ellipsoidal thin curved shell under explosion shock wave. The dynamic deformation process of the shell under explosion was captured using stereo-DIC technology, and the global deformation distribution and evolution were obtained under different loading conditions. The shell had two deformation modes: center to edge expansion and edge to center expansion. According to the experimental results, the global deformation distribution formula of the final state under the completely overturning condition was given. The main variables in the experiment are dimensionless and fitted to show their relationship with the central deformation of the shell. The work in this paper lays a foundation for further research on the effects of shell geometry, charge mass, explosion distance and shell material on deformation.