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Latest articles
Improving Load Balance in MPP-LSDYNA for ALE and SPH
In an earlier post on decomposition and region domains we saw how customized PFILE can be used to improve load balancing. Two new commands “aledist” and …
D3VIEW 2.0 Beta Released
As of today, D3VIEW 2.0beta has been officially released in a closed environment. Update Due to heavy traffic, the site is currently down. Should be up …
Timestep Calculation
Attached is a simple Excel sheet that can be used to quickly evaluate the timestep calculated by LS-DYNA for solids, beams and shells. It must be noted …
CONTACT_AUTO_MOVE to eliminate initial contact clearances
In many situations, initial clearances between two contact surfaces can cause convergence issues in IMPLICIT analyses while wasting simulation time in …
Non-Structural-Mass (NSM) Lumping in LS-DYNA
LS-DYNA provides three ways to account for the non-structural-mass lumping on structures. 1. Traditional Node Based Mass Lumping using …
Yield Stress, Strain-rate Dependency in MAT_024 and the significance of SIGY
*MAT_PIECEWISE_LINEAR_PLASTICITY (*MAT_024) is widely used material model for metals and in some cases plastics. Its popularity is widespread since it …
d3View v2.0beta – LS-DYNA Simulation Data Manager – Releasing Shortly
Since the first release of d3View, there have been many incremental but bold steps that were taken to tackle the problem of simulation data management …
Initializing Velocity
Initial velocity is always specified to a single node and can carry only one value. Multiple initial velocity definitions for the same node will always use …
Force Deflection to Effective Stress vs Effective Strain
Attached is a simple code that I wrote a while back to convert a force-deflection/engineering-stress_strain/true_stress_strain curve to effective stress vs …
Simulation “Pack” to Perform Design or Numerical Variable Studies
In an iterative simulation process, the main problem or difficulty is to use the existing results to understand its dependency on certain variables (design …
Tiebreak Example # 1
Here is one of the simplest set up of a tiebreak test problem that was developed earlier. You can test the tiebreak under any load case by simply including …
MIT Open Course Ware
Recently, I came across this MIT Open Course Ware and thought it might be useful for others as well. MIT has made more than 1800 courses available at no …