Senior Design Fixture Analysis

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Senior Design Fixture Analysis

• ME 450 Finite Element Analysis
• Dr. K Nema
• Final Project
• Javier Angulo
• Matt Schonauer
• Avery Sheets

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Overview

• Introduction
• Background
• Model Details
• Analysis and Results
• Conclusions

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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

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Background

• Remy designs and manufactures starters

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Background

• Most analysis of products is done using FEA
• Testing is usually a break it test
• Tests arent universal and standardized
• No reliable way to compare current products to
  competitor products

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Background

• Force transmission path through individual
  components

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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

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Model Details
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Model Details
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Model Details
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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

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Analysis and Results

• Attempt 2

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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

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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

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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

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Analysis and Results

• Pro Engineer problems
• Deleted features still stored in the database
• Had to create a completely new part

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Analysis and Results

• Maximum torque that can be applied is 1130 Nm

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Analysis and Results

• Maximum von Mises stress is 48.51 MPa
• Maximum deflection is 0.004 mm (negligible)

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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