ElasticBilin Material

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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.

uniaxialMaterial ElasticBilin $matTag $EP1 $EP2 $epsP2 <$EN1 $EN2 $epsN2>

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

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Code Developed by: fmk