Nbd lsd models penetration








Implementing the Pareto/NBD Model in SAS





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Initial Penetrations — LS-DYNA Support
Instead of a fixed number of iterations to remove penetration by LS-DYNA, external preprocessors allow a user-defined number of iterations until a certain level of acceptable penetrations are reached. Accepting this, there are several methods to treat initial penetrations and they are briefly discussed here:. Eliminates contact stresses at time zero cycle 1 Distorts original geometry at locations where the penetrations are detected Nodal coordinates after the removal process could still penetrate other neighboring segments and may lead to instability issues. Initial Penetrations in Contact Interfaces 1.







Description: Eliminates contact stresses at time zero cycle 1 Distorts original geometry at locations where the penetrations are detected Nodal coordinates after the removal process could still penetrate other neighboring segments and may lead to instability issues. Eliminates contact stresses at time zero cycle 1. Existence of penetration at the first cycle in non-interference contact definitions, which is after the initialization of the problem, has several adverse effects on the quality of the simulation. This initial force can in some instances be very large which may have adverse effects on the stability of the model. Use of external pre-processors.
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Date: 21.11.2015
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