4.13.5.16. ElasticBilin Material¶

uniaxialMaterial('ElasticBilin', matTag, EP1, EP2, epsP2, EN1=EP1, EN2=EP2, epsN2=-epsP2)

This command is used to construct an elastic bilinear uniaxial material object. Unlike all other bilinear materials, the unloading curve follows the loading curve exactly.

`matTag` (int)	integer tag identifying material
`EP1` (float)	tangent in tension for stains: 0 <= strains <= `epsP2`
`EP2` (float)	tangent when material in tension with strains > `epsP2`
`epsP2` (float)	strain at which material changes tangent in tension.
`EN1` (float)	optional, default = `EP1`. tangent in compression for stains: 0 < strains <= `epsN2`
`EN2` (float)	optional, default = `EP2`. tangent in compression with strains < `epsN2`
`epsN2` (float)	optional, default = `-epsP2`. strain at which material changes tangent in compression.

Note

eps0 can not be controlled. It is always zero.