A silent boundary scheme with the material point method for dynamic analyses

  • Shen L
  • Chen Z
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Abstract

To simulate the dynamic responses involv- ing different material phases in a finite computational domain without discretizing the whole problem domain, a silent boundary scheme is proposed within the frame- work of the material point method (MPM) that is an ex- tension from Computational Fluid Dynamics to Compu- tationalSolidDynamics. Because theMPMdoes not em- ploy fixed mesh connectivity, a robust spatial discretiza- tion procedure in the moving domain of influence could be designed by applying viscous damping forces along the computational boundary. To establish a simple in- terface between the discretization procedures with and without fixed mesh connectivity, a boundary layer is in- troduced to implement the continuously distributed vis- cous damping forces along the moving computational boundary. To verify the proposed procedure, a paramet- ric study is conducted with plane strain and oblique im- pact problems. The application to themodel-based simu- lation of film delamination then demonstrates the poten- tial of the proposed procedure in simulating the evolution of localized failure with different degrees of discontinu- ity under dynamic loading. keyword:

Author-supplied keywords

  • film delamination
  • mpm
  • silent boundary

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Authors

  • Luming Shen

  • Zhen Chen

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