Numerical Modeling on Crack Propagation Based on a Multi-Grid Bond-Based Dual-Horizon Peridynamics
Numerical Modeling on Crack Propagation Based on a Multi-Grid Bond-Based Dual-Horizon Peridynamics
复制标题
基于多网格键合双视野近场动力学的裂纹扩展数值模拟
DOI:
10.3390/math9222848
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发表时间:
2021-11
期刊:
影响因子:
2.4
通讯作者:
Wang Lin
中科院分区:
文献类型:
--
作者:
Dai Zili;Xie Jinwei;Lu Zhitang;Qin Shiwei;Wang Lin
Peridynamics (PD) is a novel nonlocal theory of continuum mechanics capable of describing crack formation and propagation without defining any fracture rules in advance. In this study, a multi-grid bond-based dual-horizon peridynamics (DH-PD) model is presented, which includes varying horizon sizes and can avoid spurious wave reflections. This model incorporates the volume correction, surface correction, and a technique of nonuniformity discretization to improve calculation accuracy and efficiency. Two benchmark problems are simulated to verify the reliability of the proposed model with the effect of the volume correction and surface correction on the computational accuracy confirmed. Two numerical examples, the fracture of an L-shaped concrete specimen and the mixed damage of a double-edged notched specimen, are simulated and analyzed. The simulation results are compared against experimental data, the numerical solution of a traditional PD model, and the output from a finite element model. The comparisons verify the calculation accuracy of the corrected DH-PD model and its advantages over some other models like the traditional PD model.
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DOI:
10.1016/j.cma.2020.113098
发表时间:
2020-07
影响因子:
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DOI:
--
发表时间:
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