Stress, Mises-Hencky result
The Stress, Mises-Hencky result shows the Mises-Hencky stress (maximum normal stress difference) in the part (Warp or Stress analysis), or in the wire or paddle (Microchip Encapsulation analysis), at the selected layer through the cross-section, in the deformed state after ejection has occurred.
Mesh type:
Midplane
3D
Analysis sequences that include:
- Fill+Pack+Warp
- Cool+Fill+Pack+Warp
Using this result
Use this result when the material is ductile. Consider the areas with a high level of stress and compare the results against the relevant material criteria.
Note: Due to the extrapolation from elemental centroids to the edges of elements, it is possible for small negative values to be generated for this result (Mises-Hencky stress values must, by definition, be positive). These small negative values should be taken to equal zero.
Things to look for
- Always use the maximum value of stress (either top or bottom) when checking to see if the part will fail.