Senior Design Fixture Analysis ME 450: Finite Element Analysis Dr. K Nema Final Project Javier Angulo Matt Schonauer Avery Sheets

Overview  Introduction  Background  Model Details  Analysis and Results  Conclusions

Introduction  Analysis will be done on a fixture designed for ME 462: Capstone Design  Project sponsor is Remy, Inc Out of Anderson, IN  The analysis will be purely structural Von Mises stresses Deflection/Deformation

Background  Remy designs and manufactures starters

Background  Most analysis of products is done using FEA  Testing is usually a “break it” test  Tests aren’t universal and standardized  No reliable way to compare current products to competitor products

Background  Force transmission path through individual components

Background  The particular fixture being tested will be used to connect the drive shaft to the torsion machine  The pin end will be held by the fixture

Model Details

Analysis and Results  Attempt #1  This method would not provide any moment at all  There is no implementation in Workbench to apply a pressure on part of a surface

Analysis and Results  Attempt #2

Analysis and Results  Attempt #3  An okay approximation, but not quite accurate  Placement of point forces based solely on clicking the mouse  This discrepancy caused forces to be unbalanced

Analysis and Results  Results from the last analysis indicated that the point of high stress was indeed the base of the triangular part  Rounds were added at the intersection of the circular base and the triangular chuck

Analysis and Results  Surfaces can be split into multiple surfaces in Pro Engineer  The force of the torsion machine exerted on the triangular chuck could be better modeled

Analysis and Results  Pro Engineer problems Deleted features still stored in the database  Had to create a completely new part

Analysis and Results  Maximum torque that can be applied is 1130 Nm

Analysis and Results  Maximum von Mises stress is MPa  Maximum deflection is mm (negligible)

Conclusions  Design was approved through FEA using a combination of Pro E and ANSYS Workbench  Good example of the importance of learning the theory behind FEA