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Preliminary Structural Analysis Results - Impact Tester Frame

Preliminary Structural Analysis Results - Impact Tester Frame. By: Roger Jansen March 6, 2008. Impact Tester - Frame. Background Information. Impact Tester - Frame. Seat Back Support. 38.5”. Basic Seat Orientation. Vertical Adjustment Post. Proposed Bed Plate (1/2” Thick).

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Preliminary Structural Analysis Results - Impact Tester Frame

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  1. Preliminary Structural Analysis Results - Impact Tester Frame By: Roger Jansen March 6, 2008

  2. Impact Tester - Frame Background Information

  3. Impact Tester - Frame Seat Back Support 38.5” • Basic Seat Orientation Vertical Adjustment Post Proposed Bed Plate (1/2” Thick) Proposed Base Structure (12” x 6” x 3/16” Tubing) Generic Bucket Seat

  4. Impact Tester - Frame • Head Rest Impacted with 14.7lb. Mass • Max. Deceleration = 80g • Therefore Maximum Force on Structure can be found be F=ma = 1176 lb. F = 1176 lb

  5. Impact Tester - Frame • Assume Load is Imparted Evenly to each Vertical Adjustment Post => F = 588 lb. F = 588 lb F = 588 lb

  6. Impact Tester – Worst Case • Maximum Vertical Position is 35” above the bed plate F = 588 lb F = 588 lb h = 35” h = 35”

  7. Impact Tester - Frame Summary of Contacts/Boundary Conditions and Applied Load

  8. Impact Tester - Frame Utilizing Symmetry a Half-Model was Simulated

  9. Impact Tester - Frame Base Modeled with Bonded Contacts

  10. Impact Tester - Frame Vertical Post Modeled with Bonded Contacts

  11. Impact Tester - Frame Ends of Bolts Bonded to Bedplate

  12. Impact Tester - Frame Washer Surface Bonded to Footplate

  13. Impact Tester - Frame Footplate Modeled with Frictional Contact to the Bedplate

  14. Impact Tester - Frame Fixed Displacement/Rotation

  15. Impact Tester - Frame Symmetry Constraint

  16. Impact Tester - Frame Bolt Clamp Load

  17. Impact Tester - Frame Applied Force

  18. Impact Tester - Frame Description of Material Model

  19. Impact Tester - Frame • Linear Material Model E = 29 x 10^6 psi Poisson's Ratio = 0.3 • Assume All Material is Std. Structural Steel (A36) Sy = 36ksi Su = 50ksi • Assume Bolts Have a Proof Strength of 120,000psi

  20. Impact Tester - Frame Description of Mesh

  21. Impact Tester - Frame Mesh

  22. Impact Tester - Frame Mesh

  23. Impact Tester - Frame Mesh

  24. Impact Tester - Frame • Global Element Size = Program Controlled • Number of Nodes = 29,897 • Mid-side Nodes = Program Controlled • Number of Elements = 9,360 • Types of Elements Used: SOLID186, SOLID187, TARGE170, CONTA174 & SURF154

  25. Impact Tester - Frame Summary of Results

  26. Impact Tester - Frame Force Convergence Chart

  27. Impact Tester - Frame Total Deformation

  28. Impact Tester - Frame Total Deformation

  29. Impact Tester - Frame Contact Analysis on Footplate

  30. Impact Tester - Frame Total Deformation

  31. Impact Tester - Frame Equivalent Stress

  32. Impact Tester - Frame Note: Allowable Stress = 36ksi Equivalent Stress – Foot Plate

  33. Impact Tester - Frame Note: Allowable Stress = 36ksi Equivalent Stress – Bed Plate

  34. Impact Tester - Frame Note: Allowable Stress = 36ksi Equivalent Stress – Forward Inside Gusset

  35. Impact Tester - Frame Note: Allowable Stress = 36ksi Equivalent Stress – Forward Outside Gusset

  36. Impact Tester - Frame Note: Allowable Stress = 36ksi Equivalent Stress – Backside Outside Gusset

  37. Impact Tester - Frame Note: Allowable Stress = 36ksi Equivalent Stress – Vertical Post

  38. Impact Tester - Frame Note: Allowable Stress = 120ksi Equivalent Stress – Bolts

  39. Impact Tester - Frame • Conclusions • Allowable Stress is not exceeded in any part • Maximum Deformation = 0.021”

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