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Practical work from simulation, physical testing, data, automation, and the decisions that connect them.
Latest articles
Packing LS-DYNA Input Files for Easy Distribution (v1.1a)
In a previous post about a simple Python script that scans a LS-DYNA input file to package all INCLUDED files recursively so the entire model can be …
Damage modeling using GURSON
Material parameter identification of GURSON material requires a process of fitting using an optimization package such as LS-OPT to match against a measured …
Optimizing monotonically increasing load curves
In cases where a monotonically increasing curve such as pressure_vs_leakage in *AIRBAG or effective_stress_vs_effective_strain in plasticity models in *MAT …
Characterizing plasticity material models using data from test
It is common to perform a uni-axial tensile test on a material sample to generate stress-strain curve for use in numerical models in LS-DYNA. The problem …
Termination due to Added Mass
In older versions of LS-DYNA (950 and lower) , when mass-scaling was active and over the course of the simulation when the percentage of added mass was …
Packing LS-DYNA Input Files
In these days, a finite element model consists of several INCLUDE files either relative or absolute. When collaborating with other people, it is very …
971 Release 3.2 is Now Available
Here are the release notes. Features and enhancements included in 971 R3.2 that were not available in 971 R3.1 include the following:New Material …
Killing LS-DYNA Jobs
Running LS-DYNA jobs (either interactively or as a batch job) can be interrupted with sense-switch controls by creating files “d3kil”, “D3KIL” and “switch” …
Effects of Initial Penetrations
It is well known that the presence of initial penetrations can spoil the accuracy of the analysis. A few days ago, while working on ODB barrier, some …
Nice article on Inertia Tensors
Came across this nice article (PDF, 101kb) about inertia tensors.
10th LS-DYNA Users Conference
The 10th bi-annual LS-DYNA Users Conference is less than a week away. You can visit the conference home page for more details. While you are there, look …
Curve Offset in LS-DYNA
LS-DYNA offers ability to offset a defined curve. This helps us to for example to define an arbitrary fire time for airbags by simply changing the offset …