News, Blogs and Updates

LS-DYNA: Observations on Implicit Analysis

This is the 1st in a series of informal articles about one engineer’s usage of LS-DYNA to solve a variety of non-crash simulation problems. The second was on LS-DYNA: Observations on Composite Modeling, the third was LS-DYNA: Observations on Explicit Meshing, and the fourth was LS-DYNA: Observations on Material Modeling

I’m doing more and more implicit work with LS-DYNA and would like to share some of my observations on its improvement over the last couple of years. You might be surprised how far Mortar Contact and linear dynamics (e.g., PSD and general NVH) have come. This article provides a quick little overview of what is happening with LS-DYNA implicit, some tips and tricks we have learned along the way, and resources that are available to sharpen up your skill set.

Why Bother?

The World of FEA Simulation at Predictive Engineering

Here's a great overview of our services. It shows some classic stress analyses that we've done over the last several years.

This short overview animation presents project work on:

  • High-torque U-joint for a steel mill leveler
  • Vibration analysis of a metal forming tool (beer can domer)
  • Stress and vibration optimization of a space frame structure (car wash frame)
  • Nonlinear buckling analysis of a two-person submarine
  • Vibration optimization of paper mill machine component
  • Stress and fatigue analysis of 50 kW wind turbine blade hub, generator shaft and nacelle.

 

Predictive Engineering has done over 600+ FEA simulation projects in its 20 years in business. Take a look at some of our FEA consulting services, and as always, feel free to contact us with any questions!

FEA Simulation of Medical Devices using Advanced Nonlinear Analysis

Here's a video compilation of our FEA simulations of medical devices using advanced nonlinear analysis.

In all cases, these projects were benchmarked against experimental results and shown to be in tight correlation.

As an added bonus, the music is nice too!

Complex analysis demands were only part of the challenge for these projects since the medical industry also requires extensive documentation and quality assurance that the models are built per specification.

Additionally, in several cases the clients required that an accuracy assessment be performed prior to the correlation with experimental results. It was an interesting and enlightening twist that a prediction was required of the model’s precision prior to the divulgement of the experimental data.

 

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