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The local relative element volume, spatial.relVol, is a quantity that measures the local volumetric distortion of the elements. When this measure approaches zero in some part of the mesh, frame transformations become singular causing solvers to fail.
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The minimum relative element volume, spatial.relVolMin, must be > 0, otherwise the mesh elements are inverted. A suitable stop criterion using this variable is that the minimum relative element volume must be larger than a small positive number.
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The maximum relative element volume, spatial.relVolMax, is a positive scalar number that represents the maximum value of the relative element volume.
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The minimum mesh quality, spatial.minqual, must be > 0; an acceptable mesh quality is typically larger than 0.1 (where the quality measure is a number between 0 and 1).
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You do not need to use a Moving Mesh interface in domains where a Solid Mechanics interface is active. The displacements automatically control the spatial frame when Include geometric nonlinearity is selected in a study step.
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