# Hardening Material for Sensitivity

This command is used to construct a uniaxial material object with combined linear kinematic and isotropic hardening.

```tcl uniaxialMaterial Hardening $matTag $E $sigmaY $Hiso $Hkin ```
matTag

unique material object integer tag

E

initial tangent stiffness

sigmaY

yield stress (or force)

Hiso

isotropic hardening Modulus

Hkin

kinematic hardening Modulus

Note: For this material class, the sensitivity parameters can be: E, sigmaY, Hkin, Hiso