A material property set (MPset) contains the area and modulus of the bars (elements) that make up the truss. each bar can have a different size and be made of a different material by defining a material property set for each bar. In this example we will only define a single material property set.
Chosing MP sets from the Model menu displays the MPset Edit dialog:
To define an MPset, click the add button, this defines an MPset with the default values of 1.0 for both the area and modulus (E):
To change the modulus to a desired value, enter the value in the text box and hit <enter> in the text box to accept the change:
To understand what numerical values to enter, see the page on Non-Dimensionalization.
The next step is Defining elements.