TY - JOUR
T1 - An efficient CDEM-based method to calculate full-scale fragment field of warhead
AU - Wang, Haozhe
AU - Bai, Chunhua
AU - Feng, Chun
AU - Xue, Kun
AU - Zhu, Xinguang
N1 - Publisher Copyright:
© 2019
PY - 2019/11
Y1 - 2019/11
N2 - Warhead's full-scale fragment field has great significance to military production and storage safety. In this paper, an improved Continuum-Discontinuum Element Method (CDEM) will be used for the first time to solve the problems of large deformation and cross-scale calculations for warheads, describing the complete process from casing breakage to fragment scattering and landing. A fragment equivalent layer-detonation product escape algorithm is further introduced to increase calculation efficiency, and the fragmentation field is post-processed using a penetrable virtual target board algorithm. This method simulates warhead fragmentation in the full space-time domain, laying a foundation for subsequent study of questions like warhead fragmentation safety distance and fuze delay arming time. Comparison with warhead static explosion and ballistic gun testing data verify the effectiveness of this method.
AB - Warhead's full-scale fragment field has great significance to military production and storage safety. In this paper, an improved Continuum-Discontinuum Element Method (CDEM) will be used for the first time to solve the problems of large deformation and cross-scale calculations for warheads, describing the complete process from casing breakage to fragment scattering and landing. A fragment equivalent layer-detonation product escape algorithm is further introduced to increase calculation efficiency, and the fragmentation field is post-processed using a penetrable virtual target board algorithm. This method simulates warhead fragmentation in the full space-time domain, laying a foundation for subsequent study of questions like warhead fragmentation safety distance and fuze delay arming time. Comparison with warhead static explosion and ballistic gun testing data verify the effectiveness of this method.
KW - Continuum-based discrete element method
KW - Cross-scale calculation
KW - Detonation product leakage algorithm
KW - Fragments field
UR - http://www.scopus.com/inward/record.url?scp=85069546144&partnerID=8YFLogxK
U2 - 10.1016/j.ijimpeng.2019.103331
DO - 10.1016/j.ijimpeng.2019.103331
M3 - Article
AN - SCOPUS:85069546144
SN - 0734-743X
VL - 133
JO - International Journal of Impact Engineering
JF - International Journal of Impact Engineering
M1 - 103331
ER -