Replaced by ComputeElasticityTensor, ComputeSmallStrain, and ComputeLinearElasticStress (and possibly ComputeEigenstrain and ComputeThermalExpansionEigenStrain).

The LinearElasticMaterial (Doxygen) is a monolithic material that has been replaced by modular stress, strain, and elasticity tensor materials.

## Migration Instructions

To migrate from LinearElasticMaterial...

1. Add a ComputeElasticityTensor material with the C_ijkl and fill_method copied from the old material
2. Add a ComputeSmallStrain material
3. Add a ComputeLinearElasticStress material
4. Add a ComputeEigenstrain material if applied_strain_vector was specified. Set prefactor = -1 and eigen_base to the value of applied_strain_vector.
5. Add a ComputeThermalExpansionEigenStrain material if a thermal_expansion_coeff was specified in the old LinearElasticMaterial input file block. Set thermal_expansion_coefficient equal to the value of thermal_expansion_coeff, and set Temperature to the variable given for T in the old LinearElasticMaterial input file. If T0 was specified in the old input file, set stress_free_reference_temperature to the value given for T0; if an value was not specified for T0, set stress_free_reference_temperature to 300 to preserve the old default value from LinearElasticMaterial.

## Example

The input files

moose/modules/tensor_mechanics/tests/linear_elastic/tween.i


and

moose/modules/tensor_mechanics/tests/linear_elastic/tween_new.i


are an example of a migration to Plug & Play TM. Both input files produce identical outputs.

## Old version

[Materials]
[./material]
type = LinearElasticMaterial
disp_y = disp_y
disp_x = disp_x
C_ijkl = '1 1'
elasticity_tensor_prefactor = prefactor
fill_method = symmetric_isotropic
applied_strain_vector = '0.1 0.05 0 0 0 0.01'
thermal_expansion_coeff = 1.0e-5
T = temp
[../]
[]


prefactor is a Function in this example. In the old version every aspect of the mechanics is calculated by a single material.

## New version

Compare this to the new version, where stress, strain, and elasticity tensor calculation are modular and can be exchanged for other calculation classes.

[Materials]
[./elasticity_tensor]
type = ComputeElasticityTensor
C_ijkl = '1 1'
fill_method = symmetric_isotropic
elasticity_tensor_prefactor = prefactor
[../]
[./strain]
type = ComputeSmallStrain
displacements = 'disp_x disp_y'
[../]
[./stress]
type = ComputeLinearElasticStress
[../]
[./eigenstrain]
type = ComputeEigenstrain
eigen_base = '0.1 0.05 0 0 0 0.01'
prefactor = -1
[../]
[./thermal_strains]
type = ComputeThermalExpansionEigenStrains
Temperature = temp
thermal_expansion_coefficient = 1.0e-5
stress_free_reference_temperature = 300
[../]
[]


Refer to the top of this page with specific instructions for migrating an old LinearElasticMaterial input file to the new Plug-and-Play Tensor Mechanics structure.