Using the viscoelastic peridynamics technique,a dynamic fracture criterion for the elongation of the near-field dy-namic bond was obtained by analogy with the uniaxial strength J criterion of concrete.By simulating components such as filled concrete slabs and beams under aggregates,the influence of aggregates on crack morphology and crack propagation pathways under different loading rates was explored.The outcomes revealed that the larger the loading rate,the greater the fracture degree of the aggregates filled in concrete.The dynamic fracture J criterion can effectively delineates concrete's failure modes under dynamic loading conditions,and this method provides guidance for damage prevention and control engineering of concrete.
关键词
近场动力学/动态断裂准则/混凝土破坏/动态荷载/三点弯曲
Key words
pridynamics/dynamic fracture criterion/concrete failure/dynamic load/three point bending
维普
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