Dynamic fracture mechanics and energy distribution rate response characteristics of coal containing bedding structure.

ABSTRACT: To investigate the influence of bedding structure and different loading rates on the dynamic fracture characteristics and energy dissipation of Datong coal, a split Hopkinson bar was used to obtain the fracture characteristics of coal samples with different bedding angles. The process of crack initiation and propagation in Datong coal was recorded by the high-speed camera. The formula for the model I fracture toughness of the transversely isotropic material is obtained on the basis of the finite element method (FEM) together with the J-integral. By comparing the incident energy, absorbed energy, fracture energy and residual kinetic energy of Datong coal samples under various impact speeds, the energy dissipation characteristics during the dynamic fracture process of coal considering the be

SUBMITTER: Gong S 

PROVIDER: S-EPMC8224884 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature