Young's Modulus
When you create a new material in My Materials, you can define its stiffness and linear elasticity by using Young's modulus in one of three ways. Select Constant, Exponential Decay, or Data Points to define it.
Constant
Default option
Exponential Decay
Enter an Initial value and Saturated value. Enter a float value for Exponent, where the default is 0.0.
Data Points

E = Youngs Modulus
Einf = Saturated value
CE = Exponent
Ep = Plastic strain changes from 0 to 1.0 for X - axis
This equation is used to create the data point and curve. The Initial
value will be the first datapoint for plastic strain of 0.0.