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Latest articles
Tiebreak Contact in LS-DYNA
Tiebreak contacts in LS-DYNA have undergone significant enhancements in recent versions. A brief overview is provided in the PDF document below. Special …
Mesh Refinement Studies Involving Shell Elements
In many situations, we tend to change the mesh density to study its effect on simulation responses. Two issues things that are seldom addressed are the …
DKT Triangular Shell for Crash
Default element sorting for 3-noded shell elements uses the collapsed BT formulation which is not recommended but is maintained for backward compatibility. …
Contact Surface Generation for Solid Elements
By default, when a solid part ID is included in a contact slave or master part set, LS-DYNA generates a segment list for only the outer skin of the solid …
Consolidating Multiple Contact Definitions to a Single Contact
Over the last few years, the simplicity of defining a global AUTOMATIC_SINGLE_SURFACE contact to treat the interactions between multiple parts of varying …
Principal Stress Calculator for Shell Elements in DYNAIN File
Recently, there was a request to ouput the principal stresses for each element at lower and upper surfaces of each shell element in DYNAIN file to use in …
LSTC’s New and Improved Rigid Hybrid III 50th Percentile Dummy for LS-DYNA Simulations
A new and improved rigid hybrid III dummy is available in beta version. If you are interested in beta testing of this dummy, please contact Sarba …
History of LS-DYNA – By Dr. David Benson
Came across this nice presentation by Dr. David Benson.
Smoothing Length in SPH
Update James Kennedy reported a minor print error with regards to default smoothing length calculation. This has been corrected. Thanks James. In Smoothed …
Viscous Damping Coefficient (VDC) in SPH Contact
Viscous Daming Coefficient (VDC) is freqeuntly used in contact interface definitions (*CONTACT) to damp out oscillations normal to the contact segment. It …
True Total Strain to Effective Plastic Strain
While converting true-stress vs true-strain curve into effective stress vs effective plastic strain, the removal of elastic strains can be based on a …
Interface Binary Output for Single Surface Contact
When requesting interface binary file, which consists of a number of useful data such as pressure/friction_energy, etc that can be contour plotted, LS-DYNA …