Surface Compressive Stress Surface Stress at the Teeth,
Surface Endurance Strength,
Elastic Coefficient,
Material Hardness,
Factor of Safety for Surface Fatigue Failure.

0:00 Surface Stresses
0:31 Hertz Contact Theory
3:35 Radius of Curvature of Teeth
4:46 Contact Stress Equation
5:56 Infinite Life? Hardness
6:49 Factor of Safety
7:21 Pitting Example

Previous Video: Lewis Bending Stress at the Teeth of a Gear in Just Over 12 Minutes
   • LEWIS BENDING STRESS at the Teeth of ...  

Example 1:    • Pitting  Fatigue Contact Compressive...  
Example 2:    • Pitting  Fatigue Contact Compressive...  

Next Video: Bearings Basics and Bearing Life for Mechanical Design in 10 Minutes
   • BEARINGS BASICS and Bearing Life for ...  

_____________________________________________

Other "Mechanical Engineering Design 1" Links:

1. Axial Loading Review    • Axial Loading Review for Mech Design ...  
2. Torsion Review    • Torsion Review for Mechanical Design ...  
3. Pure Bending and Deflection Review    • Bending Review for Mechanical Design ...  
4. Pure Bending and Deflection Combined Example    • Deflection of Beams Review for Mechan...  
5. Shear and First Moment About Neutral Axis Review    • Transverse Shear Review for Mechanica...  
6. Mohr's Circle Review    • COMPLETE Mohr's Circle Review in Just...  
7. Brittle Failure Theories Fracture Criteria    • Brittle Failure Theories  Facture Cr...  
8. Ductile Failure Theories Yield Criteria    • Ductile Failure Theories  Yield Crit...  
9. Design Factor and Uncertainty vs. Factor of Safety    • DESIGN FACTOR and Uncertainties for M...  
10. Tolerance Stack Ups and Tolerance Loops    • Uncertainty for Design Factor Calcula...  
11. Castigliano's Theorem    • Castigliano's Theorem in Under 10 Min...  
12. Fracture Toughness    • FRACTURE TOUGHNESS and Crack Modes  i...  
13. Crack Propagation    • CRACK PROPAGATION and Paris Equation ...  
14. Fatigue SN Diagrams    • Fatigue (StrengthNumber of Cycles) S...  
15. Marin Factors and Corrected Endurance Limit    • Marin Factors for ENDURANCE LIMITS in...  
16. Fatigue Stress Concentration and Notch Sensitivity Factors    • Fatigue STRESS CONCENTRATIONS in Just...  
17. Fatigue Failure Criteria    • Fatigue FAILURE CRITERIA in Just Over...  
18. Shaft Design and Iterative Process    • Shaft Design for INFINITE LIFE and Fa...  
19. Power Screws – Torque to Force Relationship    • Power Screws  Torque to Force Relati...  
20. Screw Thread Stress    • Stresses at Screw Threads in Just Ove...  
21. Fastener and Member Stiffness    • Bolt (Fasteners) and MEMBER STIFFNESS...  
22. Bolt Tension    • BOLT TENSION and Tension at NonPerma...  
23. Proof Strength and Factors of Safety    • PROOF STRENGTH  Factors of Safety fo...  
24. Spring Stress and Spring Constant    • Mechanical Springs  Stress, Deflecti...  
25. Shearing Yield Strength and Presetting    • Springs  PRESETTING and Shearing Yie...  
26. Springs Fatigue – Zimmerli Data    • Springs Fatigue and ZIMMERLI Analysis...  
27. Spring Design Restrictions    • Mechanical SPRING DESIGN Strategy and...  
28. Extension Springs    • EXTENSION SPRING Design  Stresses an...  
29. Gear Relations and Nomenclature    • GEARS BASICS  Nomenclature and Main ...  
30. Gear Trains and Planetary Gears – Mechanical Advantage    • Gear Trains and PLANETARY GEARS in Ju...  
31. Spur Gear Forces and Force Components    • Gear Forces and Power Transmission of...  
32. Helical and Bevel Gear Forces    • Gear Forces of HELICAL and BEVEL GEAR...  
33. Worm Gear Forces    • WORM GEARS  Forces and Speed Relatio...  
34. Bending Stress at the Teeth – Lewis Form Factor    • LEWIS BENDING STRESS at the Teeth of ...  
35. Pitting Surface Compressive Stress    • Gear PITTING  Surface Contact Stress...  
36. Bearing Radial Loads    • BEARINGS BASICS and Bearing Life for ...  
37. Bearing Reliability    • Bearings RELIABILITY and Bearings SEL...  
38. Bearing Axial Loads and Equivalent Combined Loads    • Bearings  COMBINED Radial and Axial ...