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IfcRelaxation

Definition from IAI: Measure of the decrease in stress over long time interval resulting from plastic flow. It describes the time dependent relative relaxation value for a given initial stress level at constant strain.

HISTORY: New entity in Release IFC2x Edition 2.

EXPRESS specification:

ENTITY IfcRelaxation;
RelaxationValue  :  IfcNormalisedRatioMeasure;
InitialStress  :  IfcNormalisedRatioMeasure;
END_ENTITY;

Attribute definitions:

RelaxationValue  :  Time dependent loss of stress, relative to initial stress and therefore dimensionless.
InitialStress  :  Stress at the beginning. Given as relative to the yield stress of the material and is therefore dimensionless.

Inheritance graph

ENTITY IfcRelaxation;
ENTITY IfcRelaxation;
RelaxationValue  :  IfcNormalisedRatioMeasure;
InitialStress  :  IfcNormalisedRatioMeasure;
END_ENTITY;