Blogs

How to Become a Journeyman Simulation Engineer

It is an inside joke among simulation engineers about how long does it take to be considered a “journeyman” simulation engineer.  The answer is about five years since it takes that long for your mistakes to catch up with you!  It is a brutal profession since everyone is human but the price of failure is especially high when your FEA results are used to build prototypes that cost hundreds of thousands of dollars.  Which leads to another saying: “What is the difference between a design engineer and a simulation engineer?  A design engineer gets a second chance.”  Thus, we were pleased to hear from our client that their composite container passed mobility testing with flying colors.  Not only did it pass, the group doing the testing at Aberdeen said that it was the first time that such container had passed all tests at 100% from drop test, rail impact, heavy lift to land transport.  If you would like to read about more about our FEA work on this container, please take a look at 026_Jensen, Broad-Spectrum Stress and Vibration Analysis of Large Composite Container.pdf.

Mobility Testing of Large Composite Container - FEA Consulting Services - Composite Simulation Engineering

12th European LS-DYNA Conference, Koblenz, Germany

The LS-DYNA Conference in Koblenz, Germany was the usual blend of great presentations and even greater social events.  The location was beautiful and the Conference was especially well-organized by DYNAmore, Germany (co-sponsored with LSTC, Livermore, CA).  Predictive with ENHU, China hosted a morning run event with T-shirts to whoever could show up at 6:45 am.  Besides the run, we had our “booth” to support the LS-DYNA North American Team and on the technology side, we presented two papers: Impact Analysis of Polymeric Additive Manufactured Lattice Structures and Transient Dynamic Implicit Analysis for Durability Testing of Bus Seats.

Predictive Engineering LS-DYNA Nonlinear FEA Consulting Services - Koblenz 2019

An Engineer's User Guide to FEA Vibration Analysis

We recently compiled all of our vibration analysis seminars and white papers from over the years into one comprehensive document on vibration analysis. It's posted at AppliedCAx.com, where one can find all of our FEMAP resources. Vibration analysis is a huge topic and is easily the second most common type of FEA analysis after basic static stress analysis.

Within the field of vibration analysis, the most common type of analysis is that based on the linear behavior of the structure or system during its operation. That is, its stress/strain response is linear and when a load is removed, the structure returns to its original position in a stress/strain free condition.

Although this might sound a bit restrictive, it actually covers a huge swath of structures from automobiles, planes, ships, satellites, electrical circuit boards and consumer goods. If one needs to consider a nonlinear response of the structure during operation, there exist codes such as LS-DYNA that can solve for the complete nonlinear vibration response. But that is not simple or basic and is left for another seminar sometime in the future.

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