# Superposition effect

**URL:** https://discourse.paraview.org/t/superposition-effect/10950
**Category:** ParaView Support
**Created:** [December 8, 2022, 2:41pm UTC](https://discourse.paraview.org/t/superposition-effect/10950 "2022-12-08T14:41:26Z")
**Posts on this page:** 2
**Page:** 2

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### Author: ![FEngineer](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/f/5f8ce5/32.png) [@FEngineer](https://discourse.paraview.org/u/FEngineer)
#### Post date: [December 14, 2022, 5:59pm UTC](https://discourse.paraview.org/t/superposition-effect/10950/21 "2022-12-14T17:59:26Z")

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Isn’t it better to sum von Mises stresses directly ?

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### Author: ![Matteo](https://discourse.paraview.org/user_avatar/discourse.paraview.org/matteo/32/10540_2.png) [@Matteo](https://discourse.paraview.org/u/Matteo)
#### Post date: [December 14, 2022, 6:09pm UTC](https://discourse.paraview.org/t/superposition-effect/10950/22 "2022-12-14T18:09:20Z")

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Actually yes, but, von Mises is a scalar value. So, in order to make superposition effect, A+B, the components of the stress tensor should be summed (A\_σ\_xx + B\_σ\_xx, A\_σ\_xy + B\_σ\_xy, …). Then, all the summed σ and tangential stresses should be used to calculate von mises.  
I don’t know if the direct sum of Von Mises Arrays does what I said, or it makes only the sum point per point.

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