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 # composite:interlaminar\_normal\_stress\_operator

 Last update: 31.07.2026 

**Version: 0.0.0**

## Description

Computes the interlaminar normal stresses and updates the stress container for layered shell elements if the composite::layup\_provider\_operator is used to load lay-up data from the composites definition file of ACP. This operator cannot be used in combination with section data from the RST file. Elements with missing data are skipped.

## Inputs

InputNameExpected type(s)Description**Pin 7**   
Requiredmesh[`meshed_region`](../../core-concepts/dpf-types.md#meshed-region)Meshed Region**Pin 23**   
Requiredmaterials\_container`materials_container`Materials Container**Pin 24**   
Requiredsection\_data\_container[`fields_container`](../../core-concepts/dpf-types.md#fields-container)Section data fields container**Pin 25**   
Requiredmesh\_properties\_container[`fields_container`](../../core-concepts/dpf-types.md#fields-container)Mesh property fields container**Pin 102**   
Requiredcheck\_mesh\_regions[`bool`](../../core-concepts/dpf-types.md#standard-types)Whether to check if all the inputs have the same meshed region. This check can become expensive**Pin 400**   
Requiredstrains\_container[`fields_container`](../../core-concepts/dpf-types.md#fields-container)Strains**Pin 401**   
Requiredstresses\_container[`fields_container`](../../core-concepts/dpf-types.md#fields-container)Stresses## Outputs

OutputNameExpected type(s)Description## Configurations

NameExpected type(s)Default valueDescription**mutex**[`bool`](../../core-concepts/dpf-types.md#standard-types)falseIf this option is set to true, the shared memory is prevented from being simultaneously accessed by multiple threads.## Scripting

**Category**: composite

**Plugin**: composite

**Scripting name**: interlaminar\_normal\_stress\_operator

**Full name**: composite.interlaminar\_normal\_stress\_operator

**Internal name**: composite::interlaminar\_normal\_stress\_operator

**License**: None

## Changelog

- Version 0.0.0: Initial release.