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Fatigue STRESS CONCENTRATIONS in Just Over 10 Minutes!

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  • เผยแพร่เมื่อ 1 ส.ค. 2024
  • Fatigue Stress Concentration Factors, Kf and Kfs.
    Notch Sensitivity q and qs.
    0:00 Stress Concentrations
    0:51 Fatigue Stress Concentration
    1:41 Notch Sensitivity, q
    2:28 Notch Sensitivity Charts
    3:16 Example of Use
    STATIC Stress Concentration Factors - How to Use Charts:
    Axial Loading:
    • Stress CONCENTRATION F...
    Torsion & Bending:
    • Stress CONCENTRATIONS ...
    Previous Video: Marin Factors for Endurance Limits in Just Over 10 Minutes
    • Marin Factors for ENDU...
    Example 1: • Fatigue Stress Concent...
    Example 2: • Fatigue Stress Concent...
    Example 3: • Fatigue Stress Concent...
    Next Video: Fatigue Failure Criteria in Just Over 10 Minutes
    • Fatigue FAILURE CRITER...
    _____________________________________________
    Other "Mechanical Engineering Design 1" Links:
    1. Axial Loading Review • Axial Loading Review f...
    2. Torsion Review • Torsion Review for Mec...
    3. Pure Bending and Deflection Review • Bending Review for Mec...
    4. Pure Bending and Deflection Combined Example • Deflection of Beams Re...
    5. Shear and First Moment About Neutral Axis Review • Transverse Shear Revie...
    6. Mohr's Circle Review • COMPLETE Mohr's Circle...
    7. Brittle Failure Theories - Fracture Criteria • Brittle Failure Theori...
    8. Ductile Failure Theories - Yield Criteria • Ductile Failure Theori...
    9. Design Factor and Uncertainty vs. Factor of Safety • DESIGN FACTOR and Unce...
    10. Tolerance Stack Ups and Tolerance Loops • Uncertainty for Design...
    11. Castigliano's Theorem • Castigliano's Theorem ...
    12. Fracture Toughness • FRACTURE TOUGHNESS and...
    13. Crack Propagation • CRACK PROPAGATION and ...
    14. Fatigue SN Diagrams • Fatigue (Strength-Numb...
    15. Marin Factors and Corrected Endurance Limit • Marin Factors for ENDU...
    16. Fatigue Stress Concentration and Notch Sensitivity Factors • Fatigue STRESS CONCENT...
    17. Fatigue Failure Criteria • Fatigue FAILURE CRITER...
    18. Shaft Design and Iterative Process • Shaft Design for INFIN...
    19. Power Screws - Torque to Force Relationship • Power Screws - Torque ...
    20. Screw Thread Stress • Stresses at Screw Thre...
    21. Fastener and Member Stiffness • Bolt (Fasteners) and M...
    22. Bolt Tension • BOLT TENSION and Tensi...
    23. Proof Strength and Factors of Safety • PROOF STRENGTH - Facto...
    24. Spring Stress and Spring Constant • Mechanical Springs - S...
    25. Shearing Yield Strength and Presetting • Springs - PRESETTING a...
    26. Springs Fatigue - Zimmerli Data • Springs Fatigue and ZI...
    27. Spring Design Restrictions • Mechanical SPRING DESI...
    28. Extension Springs • EXTENSION SPRING Desig...
    29. Gear Relations and Nomenclature • GEARS BASICS - Nomencl...
    30. Gear Trains and Planetary Gears - Mechanical Advantage • Gear Trains and PLANET...
    31. Spur Gear Forces and Force Components • Gear Forces and Power ...
    32. Helical and Bevel Gear Forces • Gear Forces of HELICAL...
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    34. Bending Stress at the Teeth - Lewis Form Factor • LEWIS BENDING STRESS a...
    35. Pitting - Surface Compressive Stress • Gear PITTING - Surface...
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ความคิดเห็น • 18

  • @victoriavictoria7825
    @victoriavictoria7825 3 ปีที่แล้ว +9

    Clear. Efficient. Quick. Wonderful video!

  • @farzad_00
    @farzad_00 ปีที่แล้ว

    Thank you so much🙏

  • @fondofbunny
    @fondofbunny 3 ปีที่แล้ว +3

    Thank you for these concise summaries and examples! Sharing with my students.

  • @4ngelk1ng
    @4ngelk1ng 2 ปีที่แล้ว +1

    Your videos are amazing. Thank you. There is a question for the ka table. Values are different than most of the other tables why?

  • @lukschs1
    @lukschs1 3 ปีที่แล้ว

    Perfecto, estoy suscrito

  • @hopefullysoonaweldingengineer
    @hopefullysoonaweldingengineer 6 หลายเดือนก่อน

    not just less boring, brilliant engineering

  • @elnaeemabdalla
    @elnaeemabdalla 3 ปีที่แล้ว +1

    thanks for this excellent explanation

  • @shivasmart967
    @shivasmart967 2 ปีที่แล้ว

    tq sir

  • @sumaiyajerin2859
    @sumaiyajerin2859 2 ปีที่แล้ว +1

    Can u explain how u found point of loading P = 500, 300mm from the left? did u assume the assembly was loaded in its center?

  • @reylandregis2791
    @reylandregis2791 3 หลายเดือนก่อน

    How do you acquire notch sensitivity factor (q) not using the charts? In my design, I have notches with radius 5, and 7.2 mm which are both out of scope of the chart.

  • @saj.2958
    @saj.2958 2 ปีที่แล้ว

    Where did you source the graphs at 3:00?

  • @yashmilindpotdar8820
    @yashmilindpotdar8820 3 ปีที่แล้ว +2

    You showed the wrong formula for kf, it's upside down, by your formula kf will be between 0-1

    • @LessBoringLectures
      @LessBoringLectures  3 ปีที่แล้ว +1

      Can you point to the time in which this happens? I already checked the entire video, and I found nothing wrong with any of the Kf expressions.

    • @neutroviolet2918
      @neutroviolet2918 3 ปีที่แล้ว +1

      @@LessBoringLectures check on 1:01 in time! That one (Notched/ Notch-free) should be correct! Make it upside down!

    • @jamesthecoolguy7615
      @jamesthecoolguy7615 2 ปีที่แล้ว +1

      @@neutroviolet2918 How though? Surely if there is a notch then the fatigue life will be less than the notch-free fatigue life, so the Kf value has to be greater than 1

  • @b-42sahilkesanakurty53
    @b-42sahilkesanakurty53 3 ปีที่แล้ว

    Formula for Kt is wrong

    • @LessBoringLectures
      @LessBoringLectures  3 ปีที่แล้ว +1

      Can you point to the time in which this happens? I already checked the entire video, and I found nothing wrong with the Kt expressions.