RambergOsgoodSteel Material

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This command is used to construct a Ramberg–Osgood steel material object.

uniaxialMaterial RambergOsgoodSteel $matTag $fy $Es $a $n $eult < -GABuck $lsr $beta $r $gama > < -DMBuck $lsr < $alpha >> < -CMFatigue $Cf $alpha $Cd > < -IsoHard <$a1 <$limit> > >

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$matTag	integer tag identifying material
$fy	yield strength
$E0	initial elastic tangent
$a	“yield offset” and the Commonly used value for $a is 0.002
$n	Parameters to control the transition from elastic to plastic branches. And controls the hardening of the material by increasing the n hardening ratio will be decreased. Commonly used values for $n are ~5 or greater. ($n must be odd number.