MODELING OF DYNAMIC FRAGMENTATION: ONE-DIMENSIONAL CASE

Abstract eng:
Dynamic fragmentation (disintegration of continuous body into smaller pieces under dynamic loading) is a physical phenomenon observed in many fields of engineering and science. The crack initiation and propagation combined with stress release waves makes the whole situation nontrivial and difficult to describe by analytical means. In this contribution, continuum damage mechanics and finite element method are used for numerical simulation of a ring (or cylindrical shell) subjected to radial loading at a high strain rate (e.g. explosive). The solution is simplified to the one-dimensional case and the results (average fragment size, fragment size distribution and energy dissipation) are compared for different finite element discretizations and for different perturbations of material properties. A comparison is also made between numerical results and analytical models including newly proposed ones.

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