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

# What type of material model does the Topology Optimization block use?

## Question:

What type of material model does the Topology Optimization block use?

## Applies to:

* Topology Optimization

## Answer:

The Topology Optimization block uses the SIMP material model.

We also support orthotropic material models, but we don't support optimizing the material's frame locally.

## Keywords:

*question model isotropic material materials orthotropic SIMP*