Elastomers and Rubber:
The company provides testing, calibration and analysis of Rubber and elastomers for industrial and research purposes. The simulation of hyperelastic materials requires a sufficient understanding of the complex behavior of these materials and the determination of the parameters relevant to each material model according to the purpose of the design.
The following steps need to be performed carefully and accurately for the finite element analysis of rubber materials:
1.Material Testing:
In the simulation of large strain response of elastomeric materials and rubber, it is very important to determine the material properties. The material must be tested in such a way that all deformation modes are extracted according to the design requirements of the component. To do this, we perform the following tests using finite element analysis to determine the deformation states of the material.
- Uniaxial Tensile Test (ISO 37)
- Uniaxial pressure test (In some cases, this test has advantages over other tests).
- Plate Cutting Test
- Volumetric Test (to simulate hydrostatic pressure)
3.Determination of Material Constancy:
There are several models for the simulation of Hyperelastic and Hyperfoam in the software of Abaqus, Ansys, LS-DYNA, MSC-Mark. Neo-Hooke, Mooney-Rivlin, Ogden, Yeoh, and Arruda-Boyce models are the most commonly used modeling materials. Usually, the neo-Hook and Moni-Rivlin models are known as low-order models and the Ogden, Johannes, etc. models are known as high-order models.
4.Verification and validation:
In the curve-fitting phase, single-element testing is performed in the space of finite element software such as Abaqus to correctly predict material behavior. After the single element test, experimental tests for the material are also used to further verify the model’s accuracy.
