fix_modify AtC material command — LAMMPS documentation

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# fix_modify AtC material command

## Syntax

    fix_modify <AtC fixID> material <elementset_name> <material_id>

- AtC fixID = ID of fix atc instance

- material = name of the AtC sub-command

- elementset_name = name of the elementset

- material_id = ID of the material

## Examples

    fix_modify AtC material gap_region 1

## Description

Sets the material model in elementset_name to be of type material_id.

## Restrictions

The element set must already be created and the material must be specified in the material file given the the atc fix on construction

## Related AtC commands

- fix_modify AtC command overview

## Default

All elements default to the first material in the material file.