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Project III Q&A

Project III Q&A. Friday, 11/15/2002. MPM Simulation on Contact. Timestep (upper limit). We cannot expect to simulate waves with a velocity higher than let dynamic information to pass one cell size in just one steps. We can take. Timestep (lower limit).

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Project III Q&A

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  1. Project IIIQ&A Friday, 11/15/2002

  2. MPM Simulation on Contact

  3. Timestep (upper limit) We cannot expect to simulate waves with a velocity higher than let dynamic information to pass one cell size in just one steps . We can take

  4. Timestep (lower limit) Also we hope to finish the simulation in reasonable (say 1000) steps. If one step takes about 6 second, the whole simulation needs

  5. Plate Velocity The plate velocity can not be too slow, otherwise you need too many steps to complete the simulation. Example:

  6. No Criterion Needed on Contact Give the initial velocities, and let go!

  7. Monte Carlo Simulation

  8. Essence of MC Position change and external force introduce potential change. Lennard-Jones potential

  9. Essence of MD External forces Internal forces

  10. Continuous Simulation Things you can simulate: Displacement, strain, stress field; Number of elements in x and y direction controllable; Variable Young’s modulus to mimic composites. Damage evolution using von Mises criterion.

  11. Curved Dislocation Containing Screw and Edge Components

  12. Frank-Reed Source for Dislocation Multiplication Slipped area is shaded.

  13. Balanced Displacement FieldAround A Edge Dislocation

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