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Structural Stability

Structural Stability. Imran Ahmed Tony Martinelli Rob Ramer Pete Rogers. Overview. Project Goal Method of Analysis Theoretical Background Current Structure Structure without supports Comparative Analysis of 2 Structures Conclusions. Project Goal.

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Structural Stability

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  1. Structural Stability Imran Ahmed Tony Martinelli Rob Ramer Pete Rogers

  2. Overview • Project Goal • Method of Analysis • Theoretical Background • Current Structure • Structure without supports • Comparative Analysis of 2 Structures • Conclusions

  3. Project Goal • Exploring installation of second block icing stand. • Analyze the current stand under normal loading conditions. • Analyze stand without angled support beams under normal loading conditions. • Compare results.

  4. Method of Analysis • Structures were originally drawn in ProE and saved as .IGES files. Structures were then imported into ANSYS Workbench for analysis. • Once geometry was imported, fixed supports and loading conditions were added. • Structural Analysis was completed. • Von-Mises stresses. • Total Deformation. • Comparative analysis of two structures.

  5. Theoretical Background • Von Mises Stress1 • The Von Mises criteria is a formula for combining these 3 stresses into an equivalent stress, which is then compared to the yield stress of the material. • If the Von Mises Stress exceeds the yield stress divided by a safety factor, then the material is considered to be at the failure condition.

  6. Current Structure • Structure has angled support beams. • Area 1 Loading • 250 lbs - platform pallet jack • 50 lbs – pallet • 1100 lbs – ingredients used • 1400 lbs total • Area 2 Loading • 100 lbs – flooring weight • 200 lbs – operator • 300 lbs total • Area 3 Loading • 250 lbs - platform pallet jack • 50 lbs – pallet • 1850 lbs – ingredients used • 2050 lbs total 1 2 3

  7. Current Structure Equivalent Stress Analysis • Maximum stress was on the platform in area 3. • Very little stresses on the legs. 1 3 2 2 1 3

  8. Current Structure Total Deformation • Maximum deformation located in red. • .013487 in.

  9. Structure w/o Angular Supports • Area 1 Loading • 250 lbs - platform pallet jack • 50 lbs – pallet • 1100 lbs – ingredients used • 1400 lbs total • Area 2 Loading • 100 lbs – flooring weight • 200 lbs – operator • 300 lbs total • Area 3 Loading • 250 lbs - platform pallet jack • 50 lbs – pallet • 1850 lbs – ingredients used • 2050 lbs total 1 2 3

  10. Structure w/o Angular SupportsEquivalent Stress Analysis • Most stress in area 3. 1 2 3

  11. Structure w/o Angular SupportsTotal Deformation • Most deformation occurs on outside legs of area 3. 1 2 3

  12. Structural ComparisonEquivalent Stress • Red area represents 500.54 psi. • Less area of maximum stress. Red area represents 534.53 psi.

  13. Structural ComparisonTotal Deformation • Max. deformation: .013487 in • Less total area in max deformation. • Max. deformation: .014094 in

  14. Conclusions • Benefits of angular supports: • Equivalent Stress • Area exhibiting maximum stress was reduced. • Maximum stress reduced by approximately 35 psi. • Total Deformation • Area exhibiting maximum deformation was reduced. • Detriments of angular supports • Slightly more deformation across total area of the platform.

  15. Acknowledgements • Prof. Nema for his expertise on ANSYS. • KB Specialty Foods for allowing the use of their block icing structure.

  16. Bibliography [1] Moaveni, S. (2008). Finite Element Analysis: Theory and Applications w/ ANSYS. Upper Saddle River, NJ: Pearson Prentice Hall. [2] various. (2007, December). Elastic Properties and Youngs Modulus for some materials. Retrieved December 9, 2007, from The Engineering Toolbox: http://www.engineeringtoolbox.com

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