Bond Filters

A bond filter limits which points the solver considers — for example, you can restrict bonds to a certain region of space, or to points of a certain type. This is useful for focusing a calculation on the part of the model where you care about the results, or for excluding bonds that would otherwise prevent contact between regions.

Bond filters are an advanced feature. Most models don’t need to change the defaults, but if you build your own model you may want to adjust them.

Filter settings

Setting	What it controls
Name	A label for the bond filter.
Type	The kind of filter — for example, a rectangular plane or a cylinder.
Allow contact	Whether bonds in this filter may still allow contact between regions.
Normal	The direction the filter plane faces (X, Y, Z components).
Corner / center points	Positioning the filter region in space.
Vector, length, radius	Size and shape dimensions of the filter region.
Show	Toggle whether the filter is visible in the 3-D view.

Tip: bond filters change which bonds exist in the simulation, so they affect the results. Use them deliberately, and check your mesh looks right in the view afterwards.