Effect of Poisson&rsquo;s ratio on the fracture of brittle materials under impact loading via peridynamics

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Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (20) : 204-215.

Effect of Poisson’s ratio on the fracture of brittle materials under impact loading via peridynamics

HUANG Xiaohua,LI Shuang,JIN Yanli,YE Zhaoqing

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Abstract

The bond-based peridynamics has been shown to simulate the spontaneous initiation and propagation of cracks in solid materials, but there is a limit on the fixed Poisson’s ratio. A two-parameter bond-based PD method was proposed, which inherits the simplicity and stability of the traditional PD and expands the range of Poisson’s ratio. The model was verified by the quantitative calculation of static deformation and simulation of the crack propagation process such as the Kalthoff-Winkler test under impact loading. Furthermore, the effect of Poisson’s ratio on the fracture of parallel double cracked plates was studied. The results show that when the impact loading is constant, increase in Poisson’s ratio of brittle material will result in earlier initiation of cracks, and its impact resistance is weaken. Poisson’s ratio changes crack propagation path of the plate, which prolongs the time of fracture and reduces the penetration velocity. When impact loading is large, Poisson’s ratio will have significant influence on crack propagation path of the parallel double cracks brittle material.

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bond-based peridynamics / two-parameter / Poisson’s ratio / parallel double cracks / impact loading

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HUANG Xiaohua,LI Shuang,JIN Yanli,YE Zhaoqing. Effect of Poisson’s ratio on the fracture of brittle materials under impact loading via peridynamics[J]. Journal of Vibration and Shock, 2020, 39(20): 204-215

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