meshing and stress analysis of a “droop” limiter
DESCRIPTION
Meshing and Stress Analysis of a “Droop” Limiter. By: Geoffrey L. Ostermeyer Final Project For: ME 450 Professor: Dr. Craig Weeks December 14, 2000. Problem Statement. Model, mesh, and analyze “Droop” Limiter using Ansys for IUPUI Electric Race Car Team. - PowerPoint PPT PresentationTRANSCRIPT
Meshing and Stress Analysisof a “Droop” Limiter
By: Geoffrey L. Ostermeyer
Final Project
For: ME 450
Professor: Dr. Craig Weeks
December 14, 2000
Problem Statement
Model, mesh, and analyze “Droop” Limiter using Ansys for IUPUI Electric Race Car Team.
Analysis should include determination of stress concentrations and damper design.
Background• Designed by Senior
Design Team
• Used on the Electric Race Car
• Limits Rear End Lift to 3/16”
The Droop Limiter
Parts – Defined
Steel Washer
Rubber Washer
-- Damper
Upper Bracket
Tie-Rod
Tie-Rod
Connector A-Frame
Mounting Bolt
Geometry Generation
Import IGES files from Pro-E
Create Volumes in Ansys
Simplified Geometries
Pro-E Imports
Ansys Volumes
Simplified Geometries
From
To
Combining Parts
Volume Adding
Surface Coupling
Contact Surfaces
Adding Volumes
Coupling Surfaces
Contact Surfaces
Assembled Geometries
Meshing
Mapped versus Free
Completed Mesh
Stress Analysis – Tie-Rod Connector
Stress Analysis – Upper Bracket
Stress Analysis – Washer/Tie-Rod Weld
Damper Design
Conclusions
Stress Concentration on Tie-Rod Connector is not expected to be a problem.
Upper bracket and washer/tie-rod weld stress concentrations are potential hazards.
At current dimensions, the damper would require a Young’s Modulus of approximately 30,000 psi (Polyester Elastomer).
A more conventional rubber may be used with a smaller washer thickness.