Elastic-Perfectly Plastic Material

This command is used to construct an elastic perfectly-plastic uniaxial material object.

uniaxialMaterial ElasticPP $matTag $E $epsyP <$epsyN $eps0>

---

$matTag	integer tag identifying material
$E	tangent
$epsyP	strain or deformation at which material reaches plastic state in tension
$epsyN	strain or deformation at which material reaches plastic state in compression.
	(optional, default is tension value)
$eps0	initial strain (optional, default: zero)

Code Developed by: fmk