TY - JOUR
T1 - Dynamic mesoscale cracking modeling of energetic composite materials in Hopkinson bar test
AU - Liu, Rui
AU - Chen, Peng Wan
AU - Kang, Ge
AU - Zhu, Shun Peng
AU - Carpinteri, Andrea
AU - Guo, Yan song
N1 - Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2022/2/1
Y1 - 2022/2/1
N2 - Dynamic cracking behavior of energetic composite materials (ECMs) is very difficult to be modelled due to the complex microcrack evolution. The microcrack evolution in highly particle-filled composite materials presents asymmetrical characteristics under tension–compression. In this paper, a dynamic mesoscale viscoelastic model taking into account the microcrack growth is developed to simulate the center splitting phenomenon of the Octahydro-1,3,5,7-Tetranitro-Tetrazocine-based ECM Brazilian disc under dynamic loadings by means of the Hopkinson bar test. The microcrack evolution modeling fully considers cracking nucleation, growth and coalescence. The Mohr-Coulomb failure criterion is used to drive the crack propagation. The dynamic cracking formation in the test is captured well. The details of the cracking are analyzed for different loading conditions. The cracking initiation orientation is modelled with different precrack conditions. In addition, the effect of the failure criterion on the dynamic cracking condition is determined. Further, the heterogeneous failure surfaces are considered and compared with the unique failure surface condition.
AB - Dynamic cracking behavior of energetic composite materials (ECMs) is very difficult to be modelled due to the complex microcrack evolution. The microcrack evolution in highly particle-filled composite materials presents asymmetrical characteristics under tension–compression. In this paper, a dynamic mesoscale viscoelastic model taking into account the microcrack growth is developed to simulate the center splitting phenomenon of the Octahydro-1,3,5,7-Tetranitro-Tetrazocine-based ECM Brazilian disc under dynamic loadings by means of the Hopkinson bar test. The microcrack evolution modeling fully considers cracking nucleation, growth and coalescence. The Mohr-Coulomb failure criterion is used to drive the crack propagation. The dynamic cracking formation in the test is captured well. The details of the cracking are analyzed for different loading conditions. The cracking initiation orientation is modelled with different precrack conditions. In addition, the effect of the failure criterion on the dynamic cracking condition is determined. Further, the heterogeneous failure surfaces are considered and compared with the unique failure surface condition.
KW - Cracking formation
KW - Dynamic Brazillian disc test
KW - Dynamic mesoscale viscoelastic model
KW - Microcrack evolution
KW - the Mohr-Coulomb failure criterion
UR - http://www.scopus.com/inward/record.url?scp=85119184347&partnerID=8YFLogxK
U2 - 10.1016/j.compstruct.2021.114989
DO - 10.1016/j.compstruct.2021.114989
M3 - Article
AN - SCOPUS:85119184347
SN - 0263-8223
VL - 281
JO - Composite Structures
JF - Composite Structures
M1 - 114989
ER -