Select the material property you want to define using one or more algebraic functions. For the example presented in Example, select Heat capacity per unit mass.

Click the PMAT button at the top of the Ansys Polydata menu. The button will change to PMAT [on] to indicate that the PMAT feature is enabled.

Specify the related parameters for the selected property. For example, enter the value of the coefficient a for the heat capacity. The value that you specify will be used as in Equation 9–2.

When you accept the new value for the parameter, Ansys Polydata will bring you to the Functional dependence of... menu for the specified parameter.

In the Functional dependence of... menu, specify the type of functional dependence. The choices are as follows:

For the example in Example, select Sum.

Define each function .

1. Create a function.

     Create a new function

2. Select the function name (f1(...), by default, for the first one you define).

     f1(...)

3. Select the appropriate type of function from the list of choices.

   • f = a

   • f(X1) = a+b*X1+c*X1**2+dX1**3+e*X1**4

     (9–9)

   • f(X1) = Heaviside unit function

     (9–10)

   • f(X1) = 1 - Heaviside unit function

     (9–11)

   • f(X1) = Range function

     (9–12)

   • f(X1) = a*exp(b/(X1+c))

     (9–13)

   • f(X1) = Multi-ramp function

   • f(X1) = a*exp(b*(X1+c))

     (9–14)

   • f(X1) = Gaussian function

     (9–15)

   • f(X1) = smoothed ramp

     (9–16)

     where

     (9–17)

   • f(X1,X2) = a*(X1**b)*(X2**c)

     (9–18)

   • f(X1,X2) = X1*(a+b*X2+c*X2**2+d*X2**3)

     (9–19)

   • f(X1,X2) = Arefmanesh

     (9–20)

     where

     (9–21)

4. Enter the relevant coefficients at the bottom of the menu.

5. Repeat these steps for each function .

When you are done specifying properties with PMAT dependence, click the PMAT button again to turn it off. The button will change to PMAT [off] to indicate that access to PMAT has been disabled, although the defined function still exists.