DYNAMIC FRACTURE CRITERIA OF THIN CYLINDRICAL SHELLS SUBJECT TO EXPLOSIVE LOADING AT HIGH STRAIN RATE

摘要

An explosive device is chosen as an actual model to develop the dynamic fracture criteria. The dynamic stress-strain response of material is described by a hardening viscopiastic relationship. A damage variable is introduced in the determination of the fracture criteria. Final rupture of structure is decided by a strain criterion which is deduced in terms of strain rate and expansion velocity. Comparisons have been made between the results of the theoretical analysis and the experiment.