ENME 414 Computer Aided Design

HW #9: Finite Element Analysis, Due 8 am, Monday, May 4, 1998

  1. The geometry and dimension of a thin wall plate are shown below. At the central position, there is a hole for positioning a pin to fix the position of the plate. Both ends of the plate are free to deform. Two distributed loading, 100 psi, act in the horizontal direction at both ends. Two concentrated loads, 500 lbs act in the vertical direction at the both ends.

    You are asked to use a constraint case including all these constraints.

  2. Analyze the results obtained from a combined use of Pro/ENGINEER and ANSYS codes. Your work should be as detailed as possible. The minimum requirement includes the stress distribution along the longitudinal direction and the deflection in the vertica l direction. Different mesh methods, such as shell mesh and solid mesh, should be used to compare their results and gain a better understanding of the accuracy and computing time. You may evaluate your results from the two solution methods (Nodal soluti on and element solution available in ANSYS) in your discussion. This will allow you to distinguish the errors associated with Pro/ENGINEER from the errors associated with ANSYS.

  3. Since the geometry and the load case both are symmetrical, you should think about a set of constraints on the central plane to simplify the solution procedure. This is critical when you use FEA. A common approach would be to analyze a half of the whole structure.

  4. For checking your results, you may use the ADML printer. Using a color printer to demonstrate the stress distributions and deflection is required. Therefore, ftp your file to homework7 subdirectory of guest account, keep in mind that you should use y our login name at ADML computer system for your image file's name to avoid any possibility of using the same file name. Otherwise, someone's file could be replaced by others.