Mechanical Component Design; ‐-------‐-------‐-------‐-------‐-------‐-------‐-------‐------- A schematic of a clutch-te
Posted: Wed Apr 27, 2022 7:27 pm
Mechanical Component Design;
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A schematic of a clutch-testing machine is shown. The steel shaft rotates at a constant speed, ω. An axial load, 1.153P is applied to the shaft and is cycled from zero to 1.153P. The torque T induced by the clutch face onto the shaft is given by
Questions;
1)Marin Factors?
2)Endurance Limits?
3)Applied Nominal Stress in term of 'P'?
4)Notch sentivity?
5)Fatigue stress & fatigue shear stress concentration factor?
6)Combine stress in term of 'P'?
7)Maximum allowable load 'P'?
8)Factor of safety guarding against yielding?
(PLEASE FOLLOW STEP BY STEP IN ANSWERING, DON'T SKIP. USE THE GIVEN UNIT, [MPa, Pa])
f(1.153 P)(D+d) T = = 4 Where D and d are defined in the figure and f is the coefficient of friction of the clutch face. The shaft is machined with Sy = 800 MPa and Su = 1000 MPa. The theoretical stress- concentration factors for the fillet are 3.0 and 1.8 for the axial and torsional loading, respectively. Assume the load variation P is synchronous with shaft rotation. With f = 0.3, find the maximum allowable load P such that the shaft will survive a minimum of 10º cycles with a factor of safety of 3. Use the modified Goodman criterion. Determined the corresponding factor of safety guarding against yielding. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. R= 3 mm d = 30 mm 0 1.153 P Friction pad D = 150 mm
Material Properties Sy = 800 MPa Sut = 1000 MPa Marin Factors ka = Кр = Kc bloll Kd ke kr II Endurance Limits se' MPa Se = = MPa Applied Nominal Stress in term of 'P' = Ооа РІРа 00_m = P Pa mm To_a = РІРа = Tom РІРа Notch sentivity 9 = Il 9 s Fatigue stress & Fatigue shear stress concentration factor Ki = Kts Combine Stress in term of 'P' ola = РІРа = РІРа Maximum allowable load 'P' Р KN Factor of safety guarding against yielding N = :: Therefore it will be from static load. ( safe / fail)
‐-------‐-------‐-------‐-------‐-------‐-------‐-------‐-------
A schematic of a clutch-testing machine is shown. The steel shaft rotates at a constant speed, ω. An axial load, 1.153P is applied to the shaft and is cycled from zero to 1.153P. The torque T induced by the clutch face onto the shaft is given by
- Mechanical Component Design A Schematic Of A Clutch Te 1 (102.92 KiB) Viewed 50 times
- Mechanical Component Design A Schematic Of A Clutch Te 2 (93.17 KiB) Viewed 50 times
2)Endurance Limits?
3)Applied Nominal Stress in term of 'P'?
4)Notch sentivity?
5)Fatigue stress & fatigue shear stress concentration factor?
6)Combine stress in term of 'P'?
7)Maximum allowable load 'P'?
8)Factor of safety guarding against yielding?
(PLEASE FOLLOW STEP BY STEP IN ANSWERING, DON'T SKIP. USE THE GIVEN UNIT, [MPa, Pa])
f(1.153 P)(D+d) T = = 4 Where D and d are defined in the figure and f is the coefficient of friction of the clutch face. The shaft is machined with Sy = 800 MPa and Su = 1000 MPa. The theoretical stress- concentration factors for the fillet are 3.0 and 1.8 for the axial and torsional loading, respectively. Assume the load variation P is synchronous with shaft rotation. With f = 0.3, find the maximum allowable load P such that the shaft will survive a minimum of 10º cycles with a factor of safety of 3. Use the modified Goodman criterion. Determined the corresponding factor of safety guarding against yielding. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. R= 3 mm d = 30 mm 0 1.153 P Friction pad D = 150 mm
Material Properties Sy = 800 MPa Sut = 1000 MPa Marin Factors ka = Кр = Kc bloll Kd ke kr II Endurance Limits se' MPa Se = = MPa Applied Nominal Stress in term of 'P' = Ооа РІРа 00_m = P Pa mm To_a = РІРа = Tom РІРа Notch sentivity 9 = Il 9 s Fatigue stress & Fatigue shear stress concentration factor Ki = Kts Combine Stress in term of 'P' ola = РІРа = РІРа Maximum allowable load 'P' Р KN Factor of safety guarding against yielding N = :: Therefore it will be from static load. ( safe / fail)