MMPs Analysis

Flow Drill Screw (FDS) 

  • Collaboration with Ford Motor Company (USA)

  • Aluminum sheet

  • Rigid screw

  • Numerical modeling

    • Material law: Johnson-Cook material model

    • Material failure: bond-failure model

    • Numerical method: Smoothed Particle Galerkin​ (SPG)

SPG with bond-failure model is able to simulate the forming of threads during FDS process, which is a very unique capability that no other method has in the literature. The force response curve shows that the formed threads continuously resist external load as the screw plunges and rotates.

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The pull-out test is able to provide FDS joint strength along plunging direction.

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The lap-shear of FDS joint shows quite different failure pattern compared to the pull-out test.

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