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Parallel

Description

The Parallel material model combines multiple UniaxialMaterial objects into a parallel configuration where all materials have the same strain and the stresses and tangents are additive. The Parallel material model is useful for combining pre-defined models into more complex constitutive relationships. The model can be used anywhere a UniaxialMaterial is expected, e.g., as stress-strain, force-deformation, or moment-rotation.

Syntax

ops.uniaxialMaterial('Parallel',tag,*matTags)
ops.uniaxialMaterial('Parallel',tag,*matTags,'-factors',*factors)

Parameters

• tag : integer Unique material identifier
• matTags : integer[] List of previously defined uniaxial materials that will be combined in parallel

Optional Parameters

• factors : float[] Array containing factors that will be applied to the stress and tangent of each material

Notes

• The material model also imposes equal strain rates on each material and sums damping tangents

Examples

ops.uniaxialMaterial('Elastic',1,29000)
ops.uniaxialMaterial('Elastic',2,3000)
ops.uniaxialMaterial('Parallel',3,1,2)

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