UserMaterial object

The UserMaterial object defines material constants for use in subroutines UMAT, UMATHT, or VUMAT.

This page discusses:

Access

materialApi.materials()[name].userMaterial()

UserMaterial(...)

This method creates a UserMaterial object.

Path

materialApi.materials()[name].UserMaterial

Prototype

odb_UserMaterial&
UserMaterial(const odb_String& type,
             bool unsymm,
             const odb_SequenceDouble& mechanicalConstants,
             const odb_SequenceDouble& thermalConstants);

Required arguments

None.

Optional arguments

type

An odb_String specifying the type of material behavior defined by the command. Possible values are "MECHANICAL", "THERMAL", and "THERMOMECHANICAL". The default value is "MECHANICAL".

unsymm

A Boolean specifying if the material stiffness matrix, ∂⁡Δ⁢σ/∂⁡Δ⁢ε, is not symmetric or, when a thermal constitutive model is used, if ∂⁡f/∂⁡(∂⁡θ/∂⁡x) is not symmetric. The default value is false.

This argument is valid only in an Abaqus/Standard analysis.

mechanicalConstants

An odb_SequenceDouble specifying the mechanical constants of the material. This argument is valid only when type="MECHANICAL" or "THERMOMECHANICAL". The default value is an empty sequence.

thermalConstants

An odb_SequenceDouble specifying the thermal constants of the material. This argument is valid only when type="THERMAL" or "THERMOMECHANICAL". The default value is an empty sequence.

Return value

A UserMaterial object.

Exceptions

RangeError.

Members

The UserMaterial object has members with the same names and descriptions as the arguments to the UserMaterial method.