> ## Documentation Index
> Fetch the complete documentation index at: https://docs.nodi3d.com/llms.txt
> Use this file to discover all available pages before exploring further.

# ThermalExpansion

> Thermal Expansion node: Thermal-expansion law ε = α (T − T_ref) for thermal-stress analysis. Analysis › Material node in Nodi, with its inputs, outputs and properties.

Thermal-expansion law ε = α (T − T\_ref) for thermal-stress analysis.

**Category**: [Analysis](https://docs.nodi3d.com/nodi-editor/nodes.md#analysis) › Material\
**Shown in the node menu as**: Thermal Expansion

## Inputs

| Input | Type |
| - | - |
| coefficient 1/K | `Number` |
| reference temperature | `Number` |

## Outputs

| Output | Type |
| - | - |
| thermal expansion | `Analysis` |

## Properties

Properties are set in the Inspector and are used when the matching input is not connected.

| Property | Type |
| - | - |
| preset | `Category` |
| coefficient | `Number` |
| reference temperature | `Number` |

## Related nodes

Other nodes in Analysis › Material:

* [FluidMaterial](https://docs.nodi3d.com/node/fluid-material.md): Define a Newtonian fluid (viscosity / density / thermal properties) for flow analysis.
* [IsotropicMaterial](https://docs.nodi3d.com/node/isotropic-material.md): Define isotropic material for stress analysis.
* [ThermalMaterial](https://docs.nodi3d.com/node/thermal-material.md): Define isotropic thermal material for thermal analysis.


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