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Download LS-DYNA Structured User's Manual Version 960
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Control Cards Card 26. Computation Options—Arbitray Lagrangian Eulerian (3E10.0,I5,2E10.0,I5) Columns Quantity Format 1-10 Start time for smoothing E10.0 11-20 End time for smoothing E10.0 21-30 ALE advection factor (Default=1.0) E10.0 31-35 ALE analysis option, NVOIDM. See Section 75. EQ.0: single material per element EQ. n: number of single materials with possible void EQ.-n: number of multi-material Euler groups, which must not EXCEED three (3). I5 36-45 Void factor EQ.0.0: default 1.0e-04. This is the definition of a “void”. A void is obtained by multiplying the time zero density of an element by a factor call the “void factor”. E10.0 46-55 Velocity limit. The time step is scaled down if the velocities exceed this limit. E10.0 56-60 Automatic Euler boundary condition EQ.0: off EQ.1: On with stick condition EQ.2: On with slip condition This option, used for ALE and EULER formulations, defines velocity boundary conditions for the user. Velocity boundary conditions are applied to all nodes on free surfaces of an ALE or Eulerian material. For problems where the normal velocity of the material at the boundary is zero such as injection molding problems, the automatic boundary condition parameter is set to 2. This will play the same role as the Nodal Single Point Constraint. For EBC=1, the material velocity of all free surface nodes of ALE and Euler material is set to zero. I5 2.46 LS-DYNA Version 960
