橡胶材料在ABAQUS的材料参数设定

橡膠材料在ABAQUS中使用
之設定
Alvin Chen
Outline
Elastic Behavior
Compressibility (Hyperelasticity)
Strain energy potentials (Hyperelasticity) Example
Linear elasticity
→Small elastic strains (normally less then 5%)
→Isotropic, orthotropic, or fully anisotropic
→Can have property depend on temperature and/or other field variables Hypoealsticity
→Small elastic strains-the stresses should not be large compared to the elastic modulus of the material
→Load path is monotonic
→If temperature is to be included “UHYPEL”
Hyperfoam
→Isotropic and nonlinear, energy dissipation and stress softening effects →Cellular solids whose porosity permits very large volumetric changes →Deform elastically to large strains, up to 90% strain in compression
→Requires geometric nonlinearity be accounted in analysis step
Porous elasticity
→Small elastic strains (normally less then 5%)
→Nonlinear, isotropic elasticity Isotropic, orthotropic, or fully anisotropic →Can have property depend on temperature and/or other field variables Viscoelasticity
→“viscous” (internal damping) effect, time dependent
→Large-strain problem
Hyperealsticity
→For rubberlike material at finite strain the hyperelastic model provides
a general strain energy potential to describe the material behavior for
nearly incompressible elastomers. This nonlinear elasticity model is
valid for large elastic strains.
The Hyperelastic material model:
→Is isotropic and nonlinear
→Is valid for materials that exhibit instantaneous elastic response up to large strains (such as rubber, solid
propellant, or other elastomeric materials)
→Requires that geometric nonlinearity be accounted for during the analysis step, since it is intended for finite-
strain applications.
Most elastomers (solid, rubberlike materials) have very little compressibility compared to their shear flexibility. In ABAQUS/Standard to assume that the material is fully incompressible.
Another class of rubberlike materials is elastomeric foam, which is elastic but very compressible.
In ABAQUS/Standard the use of hybird (mixed formulation) elements is recommended in both incompressible and almost incompressible cases.
Hyperelastic materials are described in terms of a “strain energy potential”, which defines the strain energy stored in the material per unit of reference volume (volume in the initial configuration) as a function of the strain at that point in the material
→Arruda-Boyce form →Marlow form
→Mooney-Rivlin form →Neo-Hookean form →Ogden form →Polynomial form
→Reduced Polynomial form →Van der Waals form
→Yeoh form。