Blogs

Basics of Composite Analysis for Engineers

At our Seattle FEMAP Symposium, George Laird from Predictive Engineering presented a brief on "Basics of Composite Analysis for Engineers."

It focuses on the underlying basis of how composites function, and shows how this ties to simple and verifiable simulation models that can be easily validated for common engineering applications. The idea is to provide a roadmap on how one can idealized a structure into a composite model and have confidence that the final FEA results will validate. We view this as a multi-step process, that with a little bit of thinking will save a lot of hard work. Starting with some basics we’ll carry an example analysis forward toward final validation.

As George puts in the intro: “Once you remove a bit of the fear, uncertainty and doubt about composite simulation, building accurate first order FEM’s is pretty basic.”

We're included a link to George's presentation, as well as video of a related simulation showing decompression of composite container.

DOWNLOAD PDF: "Basics of Composite Analysis for Engineers"

Looking forward to two great upcoming FEA events

It's been busy here at Predictive Engineering. We finished holding two great training courses, our FEMAP training with a talented group of engineers, and our high-value LS-DYNA training with another outstanding group of engineers.

At the same time, we've kept up with great projects for our clients, including a broad-spectrum stress and vibration analysis of large composite container.

Two upcoming events were looking forward to:

If you're at either event, reach out to us and say "hello!"

Doing a bit of Research on Brazing of Ceramics to Metals

I was doing a bit of online research on the FEA modeling of the brazing process. We have a client making high-tech ceramic to metal fixtures. The ceramic is joined to the metal substrate via a brazing process. Upon cooling to room temperature and depending upon the geometry and material selection, residual stresses can develop to the point of causing failure of the components. It is tricky and we have embarked on a modeling project to quantify the mechanical response of these fixtures. Well, back to the story line. During this search I stumbled across this old paper that I had co-authored with a client. The paper is titled "CFD Analysis of Automatic Test Equipment." It was a trek down memory lane to see these old CFD models and realize that we have been doing CFD consulting services for more than 20+ years. It was some sweet work on large test equipment that was cooled using both water and air loops. The paper shows how we used CFD global (machine) to local modeling (board-level) to arrive at accurately predicting chip junction temperatures. Looking back, yes the models were crude and the graphics a bit funky but what can we say - it was 2002 and it worked!

If you would like to read the paper, go ahead and click here

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