George Laird's blog

A Roadmap to Linear and Nonlinear Implicit Analysis in LS-DYNA

Below is a condensed presentation of our paper "A Roadmap to Linear and Nonlinear Implicit Analysis in LS-DYNA" that we presented at the 11th International LS-DYNA User's Conference in Salzburg, Austria on May 9-11, 2017.

Here's the Abstract: The default LS-DYNA settings are tailored for running large explicit analyses. For new and even experienced users, it can be challenging setting up an implicit LS-DYNA analysis to match analytical solutions or other standard implicit FEA codes. For example, the default element formulations are based on single-point integration whereas implicit analyses benefits from full-integration. A series of example problems are provided that will allow the simulation engineer to exactly match industry standard implicit codes (complete keyword decks can be found at DYNAsupport.com). Along with these example decks, CPU-scaling results will be presented for each implicit analysis type from linear to nonlinear.

We hope you enjoy it as well as our soundtrack selection.

Coupled CFD and FEA Project Work

CFD and FEA services are our core business and have been for more than 20 years. We are broad generalists in the consulting services business and our differentiator is experience.

Recently we just completed a coupled computational fluid dynamics (CFD) and finite element analysis (FEA) project on a "Power Augmentation" device that fits onto an existing 60kW gas turbine. The energy physics of this device is to spray water droplets into the inlet of the compressor side of the turbine, thereby increasing the mass density of the already 100% saturated air. This air-water mixture is then combusted with increased gas flow, yielding a 10 to 15% boost in energy output from the turbine. In other words, one can take a 60kW turbine and turbocharge it to ~70kW at no more than 1% of the original turbine cost.

11th Bi-Annual European LS-DYNA Conference 2017 – Salzburg, Austria, May 9-11

If you are a LS-DYNA user or interested in learning more about ‘DYNA, then attending this conference in Salzburg would provide in-depth and detailed information on the reality of using the world’s most capable non-linear multi-physics FEA tool. What I find most valuable is the ability to discuss detailed modeling strategies with fellow experts and get the up-front messy details about what works and what doesn’t.

The most recent conference that I attended in Bamberg, Germany in October (14th German LS-DYNA Forum) had around 350 attendees in which 300+ were engineers that actually drove LS-DYNA. This is quite amazing since most technical conferences tend to attract a lot of salespeople that would rather advocate software over hard-earned mechanics knowledge.

Like I mentioned, if you want to sharpen up your simulation skill set, then get out of your cubical and come to Salzburg this coming May. I will promise you that you will learn a ton of new information and have some of the best networking opportunities in the world with your fellow simulation engineers.

11th Bi-Annual European LS-DYNA Conference 2017 Salzburg, AustriaLS-DYNA conference

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