S.P.H. : A SOLUTION TO AVOID USING EROSION CRITERION?
A new particle element has been added to LS-DYNA. It is based on Smoothed Particle Hydrodynamics theory. SPH is a meshless lagrangian numerical technique used to modelize the fluid equations of motion. SPH has proved to be useful in certain class of problems where large mesh distortions occur such as high velocity impact, crash simulations or compressible fluid dynamics. First, the basis principles of the SPH method will be introduced. Then, the model of perforation of a bullet through a thin plate will be presented. Two models are realised: one is made of lagrangian brick elements only, and the second one uses SPH elements for the plate. Finally, a discussion is proposed on the different methods used to deal with the penetration problem.
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S.P.H. : A SOLUTION TO AVOID USING EROSION CRITERION?
A new particle element has been added to LS-DYNA. It is based on Smoothed Particle Hydrodynamics theory. SPH is a meshless lagrangian numerical technique used to modelize the fluid equations of motion. SPH has proved to be useful in certain class of problems where large mesh distortions occur such as high velocity impact, crash simulations or compressible fluid dynamics. First, the basis principles of the SPH method will be introduced. Then, the model of perforation of a bullet through a thin plate will be presented. Two models are realised: one is made of lagrangian brick elements only, and the second one uses SPH elements for the plate. Finally, a discussion is proposed on the different methods used to deal with the penetration problem.
60.pdf
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