Convergence difficulty due to contact separation: Use *CONTACT_AUTO_MOVE to remove the initial gap in the contact surface. Relax the convergence tolerance until…
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To run implicit Dynamic Relaxation (DR): Set IDRFLG=5 and set the dynamic relaxation termination time DRTERM in *CONTROL_DYNAMIC_RELAXATION Add *CONTROL_IMPLICIT commands as necessary to govern implicit analysis…
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If loads are applied to a rigid body in implicit static, make sure RB is attached to (merged to) a…
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In the case of implicit analysis, the solution can go out-of-core if insufficient memory is allocated but that will slow…
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Do not use hex formulations, e.g., ELFORM 1,2, or 3, for tetrahedrons. Tet form 10 is available for implicit analysis (960/rev.1488). In…
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Basics The Mortar contact is activated by typically appending the suffix _MORTAR to the automatic single surface, automatic surface to surface or…
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Activate implicit by setting IMFLAG=1 on *CONTROL_IMPLICIT_GENERAL Set DT0 to a reasonable initial time step Check possible singularities in an eigenvalue analysis by requesting NEIG eigenvalues on *CONTROL_IMPLICIT_EIGENVALUE…
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THEORY: Implicit contact interfaces Several contact interfaces are now available for use in implicit calculations. Since implicit jobs take large…
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To run an implicit analysis in LS-DYNA, you’ll need at least a *CONTROL_IMPLICIT_GENERAL command to flag the solution as implicit and to…
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