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Ansys Learning Forum › Forums › Discuss Simulation › General Mechanical › Governing Equation for Deformation in nonlinear hyper-elastic material › Reply To: Governing Equation for Deformation in nonlinear hyper-elastic material

March 4, 2024 at 10:36 am
Aurojyoti Prusty
Ansys Employee

 

 

Hi,

The governing equation for large deformation is same as in small deformation (div (Sigma)+ bodyforce =0), but the stress-strain relationship is found from a energy density functional, like neo-Hookean, Mooney- rivlin, yeoh model, etc. and the stress measures are different based on which configuration you are measuring the force and the corresponding area. You can access the course link below about hyperelastic materials.

/courses/index.php/courses/large-deformation/

The details of energy density functional is given in the following link:

https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/v232/en/motion_pre/Formulations_and_Parameters_1.html

I hope this helps!

Thank you,

Aurojyoti.

 

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