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Archive for March, 2008
Ten Recommendations to Improve Contact Stability for Explicit and Implicit Simulations
Published by March 28th, 2008 in LS-DYNA Bytes. 3 CommentsHere are 10 things (based on experience) that one can use to improve contact stability in any LS-DYNA simulations. They are not in any particular order.
1. Avoid duplicate contact definitions.
The general thumbrule is no pair of node/segment or segment/segment (in soft=2) should be treated for penetration by more than one contact defintion
2. It is extremely [...]
While working on a simulation model, it is often very convenient for oneself or to others to make necessary notes that documents the changes in the input file. While each person’s method of documenting changes in short sentences could vary, a formal pattern of documentation could help unify the documentation so anyone can easily follow [...]
A recent investigation to determine the best viewing configuration for any arbitrary model required me to understand the ‘QUAT’ that appears in LS-PREPOST every time you rotate a model or change its view. If you are interested to understand this, you can view this Powerpoint document for more information.
SLURM: A Highly Scalable Resource Manager - Free and OpenSource
Published by March 27th, 2008 in LS-DYNA Bytes. 0 CommentsClustered solutions dominate the market today with MPP-LSDYNA being used worldwide when 2 or more processors per job are used. Managing compute nodes manually in a cluster is certainly primitive and hence the need for a good resource manager. SLURM is a open source resource manager with lots of good features and is available from [...]
Internal Contact for Solids using *SET_SEGMENT_GENERAL
Published by March 20th, 2008 in LS-DYNA Bytes and LS-DYNA Contact. 0 CommentsIn an earlier post on CONTACT INTERIOR , we saw how adding interior contact can help prevent negative volumes. An additional method that is available in LS-DYNA is the use of SET_SEGMENT_GENERAL to generate the interior segments of solids. When a list of parts are defined using PART_SLDIO in the SET_SEGMENT_GENERAL, LS-DYNA generates both [...]
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