me450 project
DESCRIPTION
ME450 Project. Gearbox Analysis. ME450 Finite Element Analysis Fall Semester, 2007 Prof: Dr. K. Nematollahi Team Members Aaron Huesman Jae Shin Kelly McCormick. 12-10-2007. Objective. Perform structural analysis of two competing designs of a machined aluminum gearbox casing. - PowerPoint PPT PresentationTRANSCRIPT
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ME450 Project
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Gearbox Analysis
ME450 Finite Element Analysis Fall Semester, 2007 Prof: Dr. K. Nematollahi Team Members
Aaron Huesman Jae Shin Kelly McCormick
12-10-2007
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Objective
Perform structural analysis of two competing designs of a machined aluminum gearbox casing.
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Applicable Theory
{F} = [T][K][T]-1{U}
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Introduction
Two competing designs Webbed Non-webbed
Previous choice based on ease of machining
Performing structural analysis to confirm choice
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Non-Webbed
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Webbed
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Unigraphics Model
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Forces
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Ansys Model Details
Model reduced to simplest form One half of casing used (symmetry) Gears removed Bearings simulated
Aluminum alloy material for case Brass material for bearing volumes
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Ansys Model
Solid Cylinders Simulate Bearings
Substitute
Bearing Volumes
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Boundary Conditions
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Boundary Conditions Cont…
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Element Type
Utilized ten-node SOLID92 tetrahedral elements Ideal for complicated solids with curved boundaries
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Meshing
Automatic meshing option
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Analysis
Deformation study Von-Mises Stress study
Consistent boundary conditions and forces applied.
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Deformation Distribution
Non-Webbed Webbed
Max: 5.17E-4 in. Max: 5.00E-4 in.
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Stress Distribution
Non-Webbed Webbed
Max: 4633.8 psi Max: 3497.4 psi
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Results
Non-Webbed
1. Max Deformation
= 0.00051749 in
2. Max Stress
= 4633.8 PSI
3. Mass
= 0.854 lbm
Webbed1. Max
Deformation
= 0.00050028 in
2. Max Stress
= 3497.4 PSI
3. Mass
= 0.878 lbm
%Change1. Max
Deformation
= -3.3%
2. Max Stress
= -24.5%
3. Mass
= +2.7%
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Impact Statement
Reduced chance of a failure1. Reduces potential waste of material2. Reduces potential environmental
contamination3. Reduces potential injuries (Robust
design)
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Conclusion
Webbed design is superior.
1. Less stress2. Less deformation3. Easier machining4. Minimal change in weight
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Bibliography
[1] Moaveni, Saeed. “Finite Element Analysis” Theory and Application with Ansys – 3rd Addition, Pearson Education, Inc., Pearson Prentice Hall, Upper Saddle River, NJ 07458, 2008.
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Questions