Learning Forum

[18213023481]

When I ran the program of forming a shaped jet with LSDYNA to penetrate the explosive reactive armor, I found that the explosives of the explosive reactive armor were also detonated at the same time as the armor-piercing projectile detonated. But the effect I wanted was that the jet formed by the armor-piercing projectile hit the explosive armor and caused the explosives of the reactive armor to explode, and after a few days of testing, I found that when the lsdyna version was R12.0.0, the program would achieve my expected effect, and when the lsdyna version was R13, R13.1, R14, R14.1, R15, the armor-piercing charge and the explosive reactive armor charge would detonate at the same time. In the test program I used S-ALE and used the *ALE_STRUCTURED_MESH_VOLUME_FILLING keyword to fill the liner and armor-piercing charges into the grid generated by the S-ALE keywords, and the charge and armor plates of the explosive reactive armor used the Lagrangian algorithm and coupled them with the *ALE_STRUCTURED_FSI keywords. In another test program, I changed the explosives of the reactive armor to be filled with *ALE_STRUCTURED_MESH_VOLUME_FILLING keywords. Both test programs had the error of simultaneous detonation of the armor-piercing charge and the reactive armor charge at the lsdyna version higher than R12.0.0. In both test procedures, the following keywords *MAT_HIGH_EXPLOSIVE_BURN and *EOS_JWL were used for the charge of armor-piercing shells, and *MAT_ELASTIC_PLASTIC_HYDRO and *EOS_IGNITION_AND_GROWTH_OF_REACTION_IN_HE were used for explosive reactive armor.