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Material Point Method Simulations of Fragmenting Cylinders Biswajit Banerjee Department of Mechanical Engineering University of Utah 17th ASCE Engineering Mechanics Conference, 2004
Outline ,[object Object],[object Object],[object Object],[object Object],[object Object]
Scenario
What happens to the container ?
Simulation Requirements ,[object Object],[object Object],[object Object],[object Object]
The Material Point Method (MPM) (Sulsky et al.,1994)
Why MPM ? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Advantages Disadvantages
Stress update ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Plasticity modeling ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Damage/Failure modeling ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Fracture Simulation ,[object Object],[object Object],[object Object]
Validation: Plasticity Models 6061-T6 Aluminum EFC Copper JC MTS SCG JC MTS SCG 635 K  194 m/s 655 K  354 m/s 718 K  188 m/s 727 K  211 m/s
Validation: Mesh dependence OFHC Copper 298 K  177 m/s MTS 6061-T6 Al 655 K  354 m/s JC 1,200,000 cells 151,000 cells 18,900 cells 735,000 cells 91,800 cells 11,500 cells
Validation: Penetration/Failure
Validation: Penetration/Failure 160,000 cells 1,280,000 cells
Validation: Erosion Algorithm
Validation: Impact
Validation: Impact Results
Validation: 2D Fragmentation
Validation: 2D Fragmentation Gurson-Tvergaard-Needleman yield, Drucker stability, Acoustic tensor, Gaussian porosity, fragments match Grady equation, gases with ICE-CFD code. JC (steel), ViscoScram (PBX 9501) MTS (steel), ViscoScram (PBX 9501)
Simulations: 3D Fragmentation
Simulation: Container in Fire
Questions ?

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Em2004 270