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Fundamentals of Machine Design A Notebook for Mechanical Engineer in PDF download
Ravi Chopra

Fundamentals of Machine Design A Notebook for Mechanical Engineer in PDF download

Ravi Chopra | 15-Jan-2016 |
The Design Process , Fatigue Analysis , Power Screws , Bolted Connections , Welded Connections , Shaft-Hub Connections , Press-fit Connections , Shafting , Couplings , Clutches , Brakes , Roller Contact Bearings , Friction and lubrication , The Full-film Lubrication ,

Hi friends, here Ravi Chopra uploaded notes for MACHINE DESIGN with title Fundamentals of Machine Design A Notebook for Mechanical Engineer in PDF download. You can download this lecture notes, ebook by clicking on the below file name or icon.

1. The Design Process ........................................................................................................... 7
1.1. General ...................................................................................................................... 7
1.2. Problem identification ................................................................................................ 7
1.3. Preliminary ideas........................................................................................................ 8
1.4. Selection of the best idea ............................................................................................ 9
1.5. Refinement................................................................................................................. 9
1.6. Analysis ................................................................................................................... 10
1.7. Implementation ........................................................................................................ 11
2. Fatigue Analysis.............................................................................................................. 12
2.1. Combined static load ................................................................................................ 12
2.2. Fluctuating load........................................................................................................ 13
2.3. Wőhler diagram........................................................................................................ 14
2.4. Fatigue diagrams ...................................................................................................... 15
2.5. Endurance limit for a machine element (modification factors)................................... 15
2.6. Safety factor............................................................................................................. 16
2.8. Selection of shape for fatigue life ............................................................................. 18
3. Power Screws.................................................................................................................. 20
3.1. Efficiency, general considerations ............................................................................ 20
3.2. Thread basics ........................................................................................................... 20
3.3. Distribution of forces in a screw-nut mechanism....................................................... 21
3.4. Torque ..................................................................................................................... 23
3.5. Efficiency of a power screw mechanism ................................................................... 23
4. Bolted Connections: part 1 .............................................................................................. 26
4.1. Load tangent to the plane of contact (loose bolts)...................................................... 26
4.2. Load tangent to the plane of contact (fitted bolts)...................................................... 27
4.3. Locking means ......................................................................................................... 29
5. Bolted connections: part 2 ............................................................................................... 32
5.1. Load normal to the contact plane (preload) ............................................................... 32
5.2. A group of bolts under normal load .......................................................................... 36
6. Welded Connections........................................................................................................ 38
6.1. Stress analysis .......................................................................................................... 38
6.2. Design of welded joints ............................................................................................ 40
7. Shaft-Hub Connections.................................................................................................... 43
7.1. Introduction.............................................................................................................. 43
7.2. Positive engagement................................................................................................. 43
7.3. Connections by friction ............................................................................................ 46
8. Press-fit Connections....................................................................................................... 49
8.1. Formulation of the problem ...................................................................................... 49
8.2. Stress and strength analysis ...................................................................................... 49
8.3. Selection of a fit ....................................................................................................... 50
9. Shafting........................................................................................................................... 54
9.1. Introduction.............................................................................................................. 54
9.2. Design approach for shafts ....................................................................................... 54
4
9.3. Checkout calculations............................................................................................... 57
9.4. Fatigue analysis........................................................................................................ 57
10. Couplings...................................................................................................................... 59
10.1. Equivalent (reflected) inertia .................................................................................. 59
10.2. Selection of a coupling ........................................................................................... 60
10.3. Rigid couplings ...................................................................................................... 60
10.4. Flexible couplings .................................................................................................. 61
10.5. Elastic couplings .................................................................................................... 63
11. Clutches ....................................................................................................................... 65
11.1. General .................................................................................................................. 65
11.2. Starting analysis ..................................................................................................... 66
11.3. Friction torque vs. design parameters...................................................................... 67
11.4. Actuation systems .................................................................................................. 68
11.5. Operating modes .................................................................................................... 68
12. Brakes ........................................................................................................................... 72
12.1. General .................................................................................................................. 72
12.2. A cone brake .......................................................................................................... 73
12.3. Band brakes............................................................................................................ 73
13. Roller Contact Bearings................................................................................................. 76
13.1. Roller contact vs. plain surface (journal) bearings ................................................... 76
13.2. General description................................................................................................. 76
13.3. Selection of the service life..................................................................................... 77
13.4. Calculation of the equivalent load........................................................................... 77
13.5. Bearing arrangements ............................................................................................. 78
13.6. Selection of fits ...................................................................................................... 79
13.7. Lubrication and sealing .......................................................................................... 79
14. Friction and Lubrication ................................................................................................ 82
14.1. Coefficient of friction: the Bowden’s theory ........................................................... 82
14.2. Properties of bearing materials................................................................................ 83
14.3. Bearing parameter (the Stribeck curve) ................................................................... 83
14.4. The Petroff’s equation ............................................................................................ 84
15. The Full-film Lubrication .............................................................................................. 86
15.1. The Reynolds equation ........................................................................................... 86
15.2. Design of full-film bearings.................................................................................... 87
15.3. Design and checkout calculations ........................................................................... 89
15.4. Full-film bearings for axial load.............................................................................. 90
Contents (part 2: units 16 to 30) .......................................................................................... 93

 

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