Experimental investigation of the yield condition in relation to dynamic loading of compressible soils

A coupled simulation of an explosion inside a lined cavity surrounded by a plastic compressible medium

“…The standard Lagrange-Eulerian mesh with the tracking of contact discontinuity leads to a significant compression of gas cells located between the contact discontinuity and the cavity wall. An effective way to avoid this problem is to use a mixed cell that contains more than one material [17].The present paper presents the proposed approach to a 2-D numerical simulation of the problem of an internal explosion occurring within a lined cavity that considers all the stages of the process: the internal charge detonation; the shock wave propagation in the internal gas (mixed cell approach) with the multiple reflections from the shell's wall; repeated gap (shell medium) opening/closure and the wave propagation in the surrounding compressible plastic medium (Grigoryan's model [18,19]). To simulate the explosive loading, the Chapman-Jouget model [20] is applied.…”

“…The present paper presents the proposed approach to a 2-D numerical simulation of the problem of an internal explosion occurring within a lined cavity that considers all the stages of the process: the internal charge detonation; the shock wave propagation in the internal gas (mixed cell approach) with the multiple reflections from the shell's wall; repeated gap (shell medium) opening/closure and the wave propagation in the surrounding compressible plastic medium (Grigoryan's model [18,19]). To simulate the explosive loading, the Chapman-Jouget model [20] is applied.…”