Solidworks Simulation Tailor to Better Hardware

Even for avant-garde FEA users the definition and assay of contact interactions is non quite straightforward and is vulnerable to modeling errors as contact interactions tin can introduce non-linearities in the FEA model. The assumptions and theory behind contact interactions need to be understood in order to avert these modeling errors and generate accurate, robust, and reliable results.

When using contact interactions in SolidWorks simulation, 1 should know the deviation between linear and non-linear contact interaction and the implication of various contact interaction settings.

Linear Vs. Not-Linear Contact Interactions:

Basic no penetration contacts in a static written report default to a "Linear" contact algorithm where certain assumptions are fabricated to improve solution speed. These assumptions are:

• Very small or no gaps between contacting parts.
• Piddling or no sliding between contacting surfaces.
• Faces that touch on stay in contact.
• External load is parallel to contact chemical element as shown below

If whatsoever of the in a higher place "linear" conditions are violated, the user then needs to choose Large Displacement option in static report backdrop, or define a non-linear written report to determine accurate contact interactions between components. Exist brash that a static written report using Big Deportation will take longer to solve.

Too, information technology is important to know, that if Large Deportation is not turned on while violating the conditions of the linear contact algorithm, the linear solution may complete without any alarm messages just that doesn't mean the solution is right.

Contact Interactions Settings:

In that location are iii master contact interactions settings:

• Node -to- Node
• Node -to- Surface
• Surface -to- Surface

The tabular array below summarizes when each type of the settings should be used and how it affects the accuracy speed and robustness of the FEA model.

Note: If a Big Deportation option is required in a static study, then, Node­ to-Node contact interaction should be avoided.

In general the surface – to – surface contact takes more fourth dimension only is the best to use as it works for almost every scenario except where the contact area is extremely tiny such as contacting lines or points.

Other Contact Tips:

Some full general contact tips that might help you change the geometry and select the correct settings are given beneath.

• Using dissever lines to reduce source surface area tin can meliorate solution efficiency.
• Using split lines to reduce the target surface area will have no upshot on the solution.
• In full general, a more refined mesh on contact faces will upshot in better and faster converging contact.
• Too fine a mesh on a Target surface could cause convergence issues.

S. Jalal Farid

Applications Engineer – Cardinal Innovation

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