SOLIDWORKS Simulation 2021: Enhanced Contact for Faster, More Stable and Accurate Results

<span data-cmtooltip='Visit Solidworks‘ class=”glossaryLink”>SOLIDWORKS® Simulation 2021 is the biggest release we have seen in many years!

We remain focused on making Simulation easier and faster for <span data-cmtooltip='Visit Solidworks‘ class=”glossaryLink”>SOLIDWORKS users to apply to their designs. With the enhanced 2021 Simulation features, you can design better products faster than ever before.

Better Performance: Faster Contact Simulation

<span data-cmtooltip='Visit Solidworks‘ class=”glossaryLink”>SOLIDWORKS Simulation 2021 calculates contact interactions significantly faster than previous versions. Solution time is improved by using parallel multicore computing, better CPU usage, faster stiffness calculation, and robust data communication for contact pairs. Designers will notice considerable benefits in models with numerous contact interactions.

Benchmark data performed by our developers and by reseller Computer Aided Technology (CATI) show performance improvements ranging from 25% to 67%.

Fig 1. Simulation model with numerous contact elements

Easier Simulation: Contact Stabilization

Many CAD models have less than perfect geometries, such as non-touching surfaces or clearance between bodies. These design elements make it more difficult for the solver to get started, which in turn prolongs solving time. <span data-cmtooltip='Visit Solidworks‘ class=”glossaryLink”>SOLIDWORKS Simulation 2021 Contact Stabilization enhancement resolves this issue.

Contact Stabilization works by adding a small numerical stiffness value to qualified areas before they come into contact. With contact stabilization, the solver can resolve instability issues encountered at the start of the solution before contact is initiated, and designers can more easily obtain Simulation results.

You may be wondering: How do I take advantage of this enhancement?

That is the best part of this story! The software automatically applies contact stabilization when your geometries have an initial clearance. This new feature is part of our Robust Default initiative, which uses Default Settings where the software fills out most settings, and the users only need to change custom fields.

Fig 2. Contact model with initial clearance

Improved Accuracy: Better convergence and more realistic contact representation between curved surfaces

When meshing components, it is difficult to capture the exact gap distance between curved surfaces, especially when a coarse mesh and/or draft elements are being used. With <span data-cmtooltip='Visit Solidworks‘ class=”glossaryLink”>SOLIDWORKS Simulation 2021, the software automatically calculates the geometry correction terms, which improve the representation of curved surfaces of cylindrical, spherical, and conical geometries. These terms are then used to improve the accuracy of the simulation results for curved surfaces. This capability has been implemented through collaboration with our sister brand SIMULIA which specializes in simulation.

Fig 3. Contact interaction between curves surfaces

New Feature: Improve Mesh Quality with a New Set of Mesh Diagnostic Tools

A high-quality mesh is key to a good simulation for result accuracy, convergence, and calculation speed. <span data-cmtooltip='Visit Solidworks‘ class=”glossaryLink”>SOLIDWORKS Simulation 2021 introduces a brand-new set of diagnostic tools that enable you to examine the quality of a mesh by identifying and isolating poor quality elements and then prompting you to fix them.

The Mesh Quality Diagnostics Tool can be used to display Aspect Ratio, Jacobian Ratio, etc. You can then use the Mesh Helper to get assistance refining the mesh at key areas and resolve mesh quality before proceeding to solve your analysis.

Fig 4. Poor quality elements identified by the new Mesh Diagnostics Tools

New Mesh Default: No Enforced Common Nodes

In 2020, we made No Enforced Common Nodesthe default to make it easier and faster to mesh

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