# 8 integration points in dat using cps3 and cps4 elements for plane stress

**URL:** <https://calculix.discourse.group/t/8-integration-points-in-dat-using-cps3-and-cps4-elements-for-plane-stress/2735>\
**Category:** Postprocessing/Visualization\
**Created:** [May 9, 2025, 5:45am UTC](https://calculix.discourse.group/t/8-integration-points-in-dat-using-cps3-and-cps4-elements-for-plane-stress/2735 "2025-05-09T05:45:00Z")\
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**Author:** ![Calc\_em](https://avatars.discourse-cdn.com/v4/letter/c/43a26b/32.png) [@Calc\_em](https://calculix.discourse.group/u/Calc_em)\
**Post date:** [May 9, 2025, 7:03am UTC](https://calculix.discourse.group/t/8-integration-points-in-dat-using-cps3-and-cps4-elements-for-plane-stress/2735/2 "2025-05-09T07:03:08Z")

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CPS3 is expanded to C3D6 (linear wedge) so it has 2 integration points. CPS4 is expanded to C3D8 (linear hexahedron) so it has 8 integration points. Indeed those elements may have non-zero stresses in the thickness direction: [Discrepancy in Element Stiffness Matrix Output using Substructure Approach - #29 by vicmw](https://calculix.discourse.group/t/discrepancy-in-element-stiffness-matrix-output-using-substructure-approach/2007/29)

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