An improved stress averaging algorithm yields better stress results for
the mid-side nodes of high-quality solid elements.
In the dialog box, under Advanced Options,
select Average stresses at mid-nodes (high-quality solid mesh
only).
The new mid-side node stress averaging algorithm yields better stress results when
irregular high stresses occur at mid-side nodes that are located at areas with steep
curvatures. The improved stress averaging algorithm does not modify the stress results
calculated at the corner nodes of elements.
For a high-quality solid element, the stresses at the mid-side nodes are
calculated by averaging the stress values of the nearest corner nodes. The new stress
averaging algorithm improves the high stresses that can occur at mid-side nodes of
tetrahedral elements located at areas with steep curvatures. An example of the stress
averaging is shown.
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- Stresses at corner nodes (1, 2, 3, and 4)
globally averaged over the shared elements.
- Stresses at mid-side nodes (5, 6, 7, 8, 9,
and 10) averaged over the associated corner nodes. For
example, stress (node 5) = (stress (node 1) + stress (node
2)) / 2
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The improved stress-averaging algorithm at mid-side nodes is available for all
stress-based results across all studies, except for Linear Dynamic studies.