# Line Material Rank Two Scalar Sampler

Compute a scalar property of a RankTwoTensor

## Description

The postprocessor LineMaterialRankTwoScalarSampler is used to output common scalar quantities computed from Rank-2 tensors along a user-defined line in the mesh. The postprocessor computes the same set of scalar quantities as the AuxKernel RankTwoScalarAux; for a full list of the available scalar quantities refer to the RankTwoScalarAux page.

The user must supply the start and end points of the line along which the Rank-2 tensor scalar quantity should be tracked. Often this class is used to track stress or strain along an exterior or interior edge of the mesh.

## Example Input File Syntax

[./vonmises]
type = LineMaterialRankTwoScalarSampler
start = '0.1667 0.5 0.5'
end = '0.8333 0.5 0.5'
property = stress
scalar_type = VonMisesStress
sort_by = id
[../]
(moose/modules/tensor_mechanics/test/tests/line_material_rank_two_sampler/rank_two_scalar_sampler.i)

## Input Parameters

• startThe beginning of the line

C++ Type:libMesh::Point

Description:The beginning of the line

• propertyName of the material property to be output along a line

C++ Type:std::vector

Description:Name of the material property to be output along a line

• endThe end of the line

C++ Type:libMesh::Point

Description:The end of the line

• sort_byWhat to sort the samples by

C++ Type:MooseEnum

Description:What to sort the samples by

### Required Parameters

• scalar_typeA scalar to ouput

C++ Type:MooseEnum

Description:A scalar to ouput

• direction0 0 1Direction vector

Default:0 0 1

C++ Type:libMesh::Point

Description:Direction vector

Default:True

C++ Type:bool

• contains_complete_historyFalseSet this flag to indicate that the values in all vectors declared by this VPP represent a time history (e.g. with each invocation, new values are added and old values are never removed). This changes the output so that only a single file is output and updated with each invocation

Default:False

C++ Type:bool

Description:Set this flag to indicate that the values in all vectors declared by this VPP represent a time history (e.g. with each invocation, new values are added and old values are never removed). This changes the output so that only a single file is output and updated with each invocation

• point10 0 0Start point for axis used to calculate some cylinderical material tensor quantities

Default:0 0 0

C++ Type:libMesh::Point

Description:Start point for axis used to calculate some cylinderical material tensor quantities

• point20 1 0End point for axis used to calculate some material tensor quantities

Default:0 1 0

C++ Type:libMesh::Point

Description:End point for axis used to calculate some material tensor quantities

• execute_onTIMESTEP_ENDThe list of flag(s) indicating when this object should be executed, the available options include NONE, INITIAL, LINEAR, NONLINEAR, TIMESTEP_END, TIMESTEP_BEGIN, FINAL, CUSTOM.

Default:TIMESTEP_END

C++ Type:ExecFlagEnum

Description:The list of flag(s) indicating when this object should be executed, the available options include NONE, INITIAL, LINEAR, NONLINEAR, TIMESTEP_END, TIMESTEP_BEGIN, FINAL, CUSTOM.

• blockThe list of block ids (SubdomainID) that this object will be applied

C++ Type:std::vector

Description:The list of block ids (SubdomainID) that this object will be applied

### Optional Parameters

• enableTrueSet the enabled status of the MooseObject.

Default:True

C++ Type:bool

Description:Set the enabled status of the MooseObject.

• use_displaced_meshFalseWhether or not this object should use the displaced mesh for computation. Note that in the case this is true but no displacements are provided in the Mesh block the undisplaced mesh will still be used.

Default:False

C++ Type:bool

Description:Whether or not this object should use the displaced mesh for computation. Note that in the case this is true but no displacements are provided in the Mesh block the undisplaced mesh will still be used.

• outputsVector of output names were you would like to restrict the output of variables(s) associated with this object

C++ Type:std::vector

Description:Vector of output names were you would like to restrict the output of variables(s) associated with this object

• control_tagsAdds user-defined labels for accessing object parameters via control logic.

C++ Type:std::vector

Description:Adds user-defined labels for accessing object parameters via control logic.

• allow_duplicate_execution_on_initialFalseIn the case where this UserObject is depended upon by an initial condition, allow it to be executed twice during the initial setup (once before the IC and again after mesh adaptivity (if applicable).

Default:False

C++ Type:bool

Description:In the case where this UserObject is depended upon by an initial condition, allow it to be executed twice during the initial setup (once before the IC and again after mesh adaptivity (if applicable).

• force_preauxFalseForces the GeneralUserObject to be executed in PREAUX

Default:False

C++ Type:bool

Description:Forces the GeneralUserObject to be executed in PREAUX