Difference between revisions of "Material Models"
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== Define a Material == | == Define a Material == | ||
You create materials using a [[Materials Command Block|<code>Material</code> command block. Within that block all material properties are set using property commands. Refer to each material type to learn about its possible properties. | You create materials using a [[Materials Command Block|<code>Material</code> command block]]. Within that block all material properties are set using property commands. Refer to each material type to learn about its possible properties. | ||
== Linear Elastic Small Strain Materials == | == Linear Elastic Small Strain Materials == |
Revision as of 13:00, 1 April 2013
Numerous material models are available in NairnMPM and OSUParticulas.
Define a Material
You create materials using a Material
command block. Within that block all material properties are set using property commands. Refer to each material type to learn about its possible properties.
Linear Elastic Small Strain Materials
The materials in this section are all small-strain, linear elastic materials. They account for rotations by using a hypoelastic correction based on the Jaumann Derivative.
Name | ID | Description | Pσ | Pε | AS | 3D |
---|---|---|---|---|---|---|
Isotropic | 1 | Linear elastic, isotropic | X | X | X | X |
Transverse 1 | 2 | Linear elastic, transversely isotropic with unique axis in the z direction | X | X | X | X |
Transverse 2 | 3 | Linear elastic, transversely isotropic with unique axis in the y direction | X | X | X | X |
Orthotropic | 4 | Linear elastic, orthotopic material | X | X | X | X |
Bistable | 10 | Elastic, isotropic material with two stable states having different properties | X | X | X |
The table columns on the right indicate if each material can be used in plane stress (Pσ), plane strain (Pε), axisymmetric (AS), or 3D calculations.
Hyperelastic Materials
The materials in this section are all large-strain, elastic materials. They account for rotations based on a hyperelastic formulation.
Name | ID | Description | Pσ | Pε | AS | 3D |
---|---|---|---|---|---|---|
Mooney | 8 | Elastic, isotropic and Ideal Rubber Elasticity | X | X | X | X |
IdealGas | 22 | Ideal gas as hyperelastic material | X | X | X |
The table columns on the right indicate if each material can be used in plane stress (Pσ), plane strain (Pε), axisymmetric (AS), or 3D calculations.
Elastic-Plastic Small Strain Materials
The materials in this section are all small-strain, elastic-plastic materials materials. They account for rotations by using a hypoelastic correction based on the Jaumann Derivative. They handle plasticity by combining one of these materials with any compatible Hardening Laws.
Name | ID | Description | Pσ | Pε | AS | 3D |
---|---|---|---|---|---|---|
IsoPlasticity | 9 | Small-strain, isotropic, elastic-plastic material | X | X | X | X |
MGEOSMaterial | 17 | Small-strain, isotropic, elastic-plastic material using a Mie-Grüneisen equation of state. | X | X | X | X |
HillPlastic | 15 | Anisotropic, elastic-plastic material. | X | X | X |
The table columns on the right indicate if each material can be used in plane stress (Pσ), plane strain (Pε), axisymmetric (AS), or 3D calculations.
Hyperelastic-Plastic Materials
The materials in this section are all small-strain, elastic-plastic materials materials. They account for rotations based on a hyperelastic formulation. They handle plasticity by combining one of these materials with any compatible Hardening Laws.
Name | ID | Description | Pσ | Pε | AS | 3D |
---|---|---|---|---|---|---|
HEIsotropic | 24 | Isotropic, hyperelastic-plastic material | X | X | X | |
HEMGEOSMaterial | 25 | Isotropic, hyperelastic-plastic material using a Mie-Grüneisen equation of state. | X | X | X | |
HEAnisotropic | 21 | Anisotropic, hyperelastic-plastic material | X | X | X |
The table columns on the right indicate if each material can be used in plane stress (Pσ), plane strain (Pε), axisymmetric (AS), or 3D calculations.
Viscoelastic Materials
The materials in this section are viscoelastic materials materials.
Name | ID | Description | Pσ | Pε | AS | 3D |
---|---|---|---|---|---|---|
Viscoelastic | 6 | Small-strain, linear viscoelastic material with sum of relaxation times | X | X | X | X |
The table columns on the right indicate if each material can be used in plane stress (Pσ), plane strain (Pε), axisymmetric (AS), or 3D calculations.
Rigid Materials
Material Class Hierarchy
Materials are C++ classes. The following class hierarchy shows the orginzation of those C++ classes in NairnMPM and OSParticulas codes. A material in green is an abstract class that is never assigned to particles. All others are material classes (by their name and their ID in parentheses):
- MaterialBase
- Elastic
- Isotropic (1)
- IsoPlasticity (9)
- MGEOSMaterial (17)
- Bistable (10)
- IsoPlasticity (9)
- Transverse 1 (2) (2.3)
- Orthotropic (4)
- AnisoPlasticity
- HillPlastic (15)
- WOODMATERIAL (19)
- HillPlastic (15)
- AnisoPlasticity
- Orthotropic (4)
- Isotropic (1)
- HyperElastic
- Mooney (8)
- HEIsotropic (24)
- HEMGEOSMaterial (25)
- HEAnisotropic (21)
- IdealGas (22)
- Viscoelastic (7)
- RIGIDMATERIAL (11)
- Elastic