# 4.13.1.7. RambergOsgoodSteel¶

uniaxialMaterial('RambergOsgoodSteel', matTag, fy, E0, a, n)

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

 matTag (int) integer tag identifying material fy (float) Yield strength E0 (float) initial elastic tangent a (float) “yield offset” and the Commonly used value for a is 0.002 n (float) 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.