News, Blogs and Updates

Cooling Analysis of Composite Mandrel using STAR-CCM+

STAR-CCM cooling analysisModern jet engines are getting bigger and also lighter. For example, years ago it was common to use titanium or stainless steel as blade-out containment materials. These large diameter and thick rings can now be replaced by modern carbon fiber composites; however, manufacturing large diameter composites with tight tolerances is difficult. One of the key challenges is maintaining tight tolerance during heating (curing) and cooling (mandrel removal) process. In a recent CFD project for a Tier 1 aerospace manufacturer, we used STAR CCM+ to simulate the thermal-flow process of cooling the composite mandrel down to room temperature. STAR was particularly suited for this project given its advanced polyhedral meshing technology coupled with a fast MPP thermal-flow solver (High Performance Computing (HPC)). Results in this CFD consulting project were verified against prior experience and hand calculations.
 

Another successful LS-DYNA training class

LS-DYNA training May 2017A quick thank-you is due to all of the attendees to our May 2017 LS-DYNA training. The five day class focused on building accurate nonlinear transient simulations. The learning process was based on workshops covering how one could take basic data (e.g.,engineering stress-strrain) and geometry and then create an advanced simulation that could be verified and taken forward to validation with confidence. Best practices were advocated from mass scaling, element formulation (elform=-16) to MORTAR contact to encourage the students to first get a model that would run and then later on optimized it for numerical efficiency. The last day of the class focused on LS-DYNA's rapidly evolving implicit capabilities. Our next LS-DYNA training class will be May 14 - 18, 2018.

 

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.

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