Study on hybrid model of peridynamics and finite element method
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School of Civil Engineering, Suzhou University of Science and Technology

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The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)

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    Abstract:

    Considering the advantages of peridynamics in simulating discontinuities and low computational cost of finite element method (FEM), In this paper, a new hybrid model was established by using the hybrid modeling method of peridynamics and finite element method.The model was set up by peridynamics theory in the region where cracks appear, and the other regions were modeled by eight node isoparametric elements. The truss element was used to connect the material points with the isoparametric nodes, and the interaction between material points could be regarded as the truss element. Finally, the stiffness of the element was integrated to realize the hybrid modeling of the two methods in the finite element frame system.The model does not need to introduce artificial damping, which improves the calculation efficiency. In addition,compared with the four node hybrid model, the hybrid model based on high order (eight node) isoparametric element and peridynamics has higher accuracy.can be applied to complex stress-strain problems.The validity of the method is verified by the numerical example, which provides a new idea to solve fracture problems.

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History
  • Received:January 17,2020
  • Revised:April 16,2020
  • Adopted:April 20,2020
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