A brand new feature for SolidWorks 2013 is the ability to create a design study that changes the material of the part file. This will allow you run multiple simulation studies on the same part with different materials. The process is as follows.
Begin a new design study.
Insert a new design study parameter.
Name the parameter, change the category to material, and make sure the body you want included is checked at the bottom.
In the design study select the material parameter you just created.
You will have the familiar material selection box. Select and apply any material you would like to add to the design study.
The final step is to add a constraint to monitor any of the static study results. Choose the run button and it will calculate all of the studies.
When the design study is finished you will get a result list displaying the material used and the monitored constraint.
Jordan Nardick, CSWE
Computer Aided Technology, Inc.