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Hyperelastic materials and Elastic materials can be used for Multi Flexible Body Dynamics simulation in RecurDyn
An elastic material is linear, whereas a hyperelastic material is nonlinear.
Elastic Material
An elastic material is a linear material. This means that stress varies linearly with respect to strain. An elastic material model is accurate for many material models, such as paper, metal, and wood, as long as the deformation is very small.
Elastic materials are widely used for finite element analysis and multi flexible body dynamics.
Hyperelastic Material
A hyperelastic material, unlike an elastic material, is designed for modeling rubber or rubber-like materials in which the elastic deformation can be extremely large.
Hyperelastic materials use something called a strain energy density function to derive the relationship between stress and strain. This allows them to model the relationship between stress and strain accurately even when the strain is between 100% to 700%, depending on the exact hyperelastic model that is used.
Various hyperelastic models are accurate over different range of strains. You must choose the hyperelastic material model to use depending on the expected range of strains, the computational expense of the formulation and the amount of data that you have to define in the stress-strain relationship.
RecurDyn offers 4 kinds of hyperelastic material models as below.
- Neo-Hooke
- Mooney-Rivlin
- Arruda-Boyce
- Ogden
▶ More details about 4 kinds of hyperelastic material models
RecurDyn users can use both hyperelastic material and elastic material appropriately for MFBD simulation.
Simulation Examples using Hyperelastic Material
<Material Nonlinearity of Hyperelastic Materials>
<Simulation of Rubber Boot and Lubricating Oil>
Webinar
High-Fidelity Simulation of Dynamic Axisymmetric Structures - CV Joint Boot - using RecurDyn
This is a webinar on High-Fidelity Simulation of Dynamic Axisymmetric Structures with Process Automation using RecurDyn.
