Spring 2007, MET415 - FEA Applications I

Prof. Dave Johnson, dhj1@psu.edu, Penn State - Erie, The Behrend College

3D Solid Sample Problem for Exam 2

Model and solve the problem below in ANSYS-Workbench and answer the questions at the bottom of the page.

A concrete base for a column is pictured above.

• Modulus = 4.35x10⁶ psi
• Poisson's Ratio = 0.18
• Use a frictionless surface for the support underneath the concrete
• The pressure load on the top face is 1000 psi.

Does this part have symmetry ?  If so, describe.

What element type was used ?

What element options were used ?  (element behavior)

What real constants were used ?

How many nodes and elements were created ?

What is the % error (SEPC) for your solution ?

What is the maximum deflection (in inches) ?

What is the maximum Principal stress (psi) ?

Where does the maximum Principal stress occur ?

What is the sum of forces on the model ?
 S Fx =         S Fy =         S Fz =
     (Get the Reaction Solution from the General Postprocessor)

ANSYS Workbench model: 1/4 symmetry, 46,243 nodes and 10,404 SOLID186 elements were meshed  Element options: default.  Real constants: none required for 3D solid elements.  The mesh error, SEPC, was 1.1%
The max. deformation was 0.00244".  The max. principal stress was 145 psi near the base, the minimum principal stress was -1145 around the top edge.  The reaction forces were Fx = 0, Fy = 36,000 #, Fz = 0