# VUMAT

**Source**: https://jerugroup.eng.ox.ac.uk/software/vumat
**Parent**: https://jerugroup.eng.ox.ac.uk/software

# VUMAT: Constitutive Model for Soft Biological Tissues

This code provides the explicit implementation of a constitutive model to define the mechanical behaviour of soft tissues. The model is developed within a thermodynamically consistent framework, provides energetic variables that can be linked to other physics of soft tissues (such as electrophysiology) and includes the following features

Main features of the code:

- Implemented in a VUMAT material subroutine for Abaqus/Explicit
- Uncoupled volumetric and isochoric responses
- Developed for finite deformations
- Strain rate dependency
- Continuum damage
- Can be used to relate mechanical deformation to other physical phenomena through energetic terms, such as alterations in electrophysiological responses

#### [**Download Link**](https://process.innovation.ox.ac.uk/software/p/16428/vumat/1)

#### **Relevant publications**

- D. Garcia-Gonzalez and A. Jérusalem. *Energy based mechano-electrophysiological model of CNS damage at the tissue scale.* **Journal of the Mechanics and Physics of Solids, 125:22-37, 2019.**\
  DOI:10.1016/j.jmps.2018.12.009