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Development and Application of an Explosion Modeling Technique Using PFC  

Choi Byung-Hee (한국지질자원연구소)
Yang Hyung-Sik (전남대학교 건설지구환경공학부)
Ryu Chang-Ha (한국지질자원연구소)
Publication Information
Explosives and Blasting / v.22, no.4, 2004 , pp. 7-15 More about this Journal
Abstract
An explosion modeling technique was developed by using the spherical discrete element code, PFC3D, which can be used to model the dynamic stress wave propagation phenomenon. The modeling technique is simply based on an idea that the explosion pressure should be applied to a PFC3D particle assembly not in the form of an external force (body force), but in the form of a contact force (surface force). According to this concept, the explosion pressure is applied to the wall particles by the scheme of radius expansion/contraction of inner-hole particles. The output wall force is compared to the input hole pressure in every time step, and a correction routine is activated to control the radius multiplier of the inner-hole particles. A comparative blast simulation far a cement mortar block of $80\times90\times80mm$ was conducted by using the conventional explosion modeling method and the new one. The results of the simulation are presented in a qualitative fashion.
Keywords
explosion modeling; PFC; blasting; cement mortar.;
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