Computational and Multi-scale Mechanics Group

Non-destructive manufacturing

• Forging, extrusion, spring back, compression molding

• Materials: metal, composite

• Large deformation, coupled thermal-mechanical, implicit and explicit

• Numerical approaches

  • Adaptivity

    • Remeshing: mesh quality & refinement, surface representation

    • Remapping: transfer internal variables through remapping functions

    • FEM: fast and robust, low order method

    • EFG: highly accurate, enhanced capabilities, slower and memory demanding​

  • SPG

    • Particle based truly meshfree method

    • Computationally stable and efficient to handle extremly large deformation

    • Only available in LS-DYNA​

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Destructive manufacturing

• Grinding, riveting, cutting, flow drill screw, self-pierce riveting, self-tapping screw, drilling

• Materials: metal, composite

• Workpiece-tool interaction and stress analysis

• Numerical approaches

  • SPG

    • Multiple kernel options for different types of material failure behavior

    • Ability to help prevent “numerical failure”

    • Flexibility to incorporate different failure indicators including those in material laws

  • Peridynamics

    • Bond-based version: brittle and composite laminate material

    • Discontinuous Galerkin framework: use FEM model as input

    • Laminate model: inner-layer and inter-layer bonds