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- Title
A Numerical Study of the Dynamic Crack Behavior of Brittle Material Induced by Blast Waves.
- Authors
Yu, Haijun; Zou, Ming; Sun, Jinshan; Wang, Yuntao; Wang, Meng
- Abstract
Blast stress waves profoundly impact engineering structures, exciting and affecting the rupture process in brittle construction materials. A novel numerical model was introduced to investigate the initiation and propagation of cracks subjected to blast stress waves within the borehole-crack configuration. Twelve models were established with different crack lengths to simulate sandstone samples. The influence of crack length on crack initiation and propagation was investigated using those models. The linear equation of state was used to express the relationship between the pressure and density of the material. The major principal stress failure criterion was used to evaluate the failure of elements. A triangular pressure curve was adopted to produce the blast stress wave. The results indicated that the pre-crack length critically influenced the crack initiation and propagation mechanism by analyzing the stress history at the crack tip, crack propagation velocity, and distance. The inducement of a P-wave and S-wave is paramount in models with a short pre-crack. For long pre-crack models, Rayleigh waves significantly contribute to crack propagation.
- Subjects
BLAST waves; STRESS waves; CRACK propagation (Fracture mechanics); BRITTLE materials; RAYLEIGH waves; EQUATIONS of state; LINEAR equations
- Publication
Materials (1996-1944), 2023, Vol 16, Issue 22, p7142
- ISSN
1996-1944
- Publication type
Article
- DOI
10.3390/ma16227142