Design of Machine Elements

Design of Machine Elements
اسم المؤلف
M. F. Spotts
التاريخ
3 ديسمبر 2019
المشاهدات
التقييم
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Design of Machine Elements
Third Edition
M. F. Spotts
Professor of Mechanical Engineering
The Technological Institute
Northwestern University
Contents
1, Fundamental Principles
1. Statical Equilibrium,
Compression Stress. 4. Statically Indeterminate Problems in Tension
And Compression. 5. Center of Gravity. 6. Bending of Beams. 7.
Moment of Inertia. 8. Principle of Superposition ,
Beam Equations. 10. Deflection of Beams,
Castings. 12. Shearing Stress. 13. Transverse Shearing Stress in
Beams. 14. Shear and Bending Moment Diagrams. 15. Slender
Compression Members Orcolumns. 16. Stresses Inanygivendirection.
17. The Mohr Circle,
Tions.
St. Venant.
2. Engineering Materials. 3. Tension and
9. Additional
11. Effect of Ribs on
18. Stresses and Deformations in Two Direc-
19. Deflection of Beam From Shearing Stress. 20. Principle of
2. Working Stresses <57
1. Stress-strain Diagrams. 2. Stress Concentration Caused by Sudden
Change in Form. 3. Stress Concentration Factors. 4. Endurance Limit
Of Materials. 5. Interpretation of Service Fractures. 6. Factors
Affecting Fatigue Strength. 7. Types of Failure. Ductile Materials
And Brittle Materials. 8. Ductile Materials With Steady Stress. 9.
Maximum Shear Theory of Failure. 10. Normal Stresses in Two Directions. 11. Mises-hencky or Distortion Energy Theory. 12. Ductile
Materials With Alternating Stress. 13. Ductile Materials With Combined Steady and Alternating Stress. 14. The Modified Goodman Diagram. 15. Brittle Materials With Steady Stress. 16. Brittle Materials
With Fluctuating Loads. 17. Sensitivity to Stress Concentration. 18.
Factor of Safety.
Shafting . 106
1. Torsion of Circular Shaft. 2. Horsepower. 3. Maximum Static
Shearing Stress. 4. Asme Code for Design of Transmission Shafting.
5. Maximum Shear Theory for Shafting. 6. Mises-hencky Theory for
Shafting. 7. Keys. 8. Stress Concentration. 9. Couplings. 10.
Xiv Contents Contents Xv
11. Shaft on Three Supports. 12.
13. Critical Speed of Rotating Shaft. 14. Deflection of
Bending Loads in Two Planes.
Crankshafts.
Shaft of Nonuniform Diameter. 15. Slope of Shaft by Elastic Energy.
16. Torsion of Noncircular Shaft. 17. Torsion of Wide Rectangular
Bar. 18. Torsion of Rectangular Bars, General Case,
Sections. 20. Materials Used for Shafting.
8. Lubrication
. . 294
1 Viscosity and Newton’s Law. 2. Measurement of Viscosity. 3.
Viscosity Index. 4. Types of Plain Sleeve Bearings. 5. The Zn/ P
Curve. 6. Petroff’s Bearing Equation. 7. Load Carrying Journal,
Bearing 8. Load and Friction Curves for Journal Bearings. 9. Heat
Balance
*
Of Bearings. 10. Designing for Film Temperature and Minimum Film Thickness. 11. Pressure Lubricated Bearing. 12. Thin
Film or Boundary Lubrication. Oiliness. 13. Bearing Materials. 14.
Bearing Loads. 15. Construction of Bearings. 16. Elastic Matching.
19. Composite
4. Springs 155
1. Helical Springs. 2. Effect of End Turns for Compression Springs
3. Properties of Spring Materials. 4. Design for Fluctuating Loads
5. Vibration or Surging of Helical Springs.
7. Helical Extension Springs.
9. Helical Springs With Torsional Loading. 10. Leaf Springs. 11
Energy Storage by Springs. 12. Rubber Springs.
6. Commercial Tolerances
9. Ball and Roller Bearings 330
8. Helical Springs of Rectangular Wire
1. Construction and Types of Ball Bearings. 2. Selection of Ball Bearings. 3. Design for Variable Loading. 4. Friction and Lubrication of
Ball Bearings. 5. Mounting of Ball Bearings. 6. Permissible Misalignment. 7. Other Types of Ball Bearings. 8. Relative Advantages
Of Ball and Plain Bearings. 9. Roller Bearings. 10. Contact Stress
Between Cylinders.
5. Screws 191
1. Kinds of Threads. 2. Standardized Threads. 3. Unified Threads.
4. American National Threads. 5. Identification Symbols. 6. Effect
Of Initial Stress. 7. Effect of Spring Washers and Gaskets. 8. Power
9. Stress Due to Impact Load. 10. Friction of Screws. 11.
12. Locknuts. 13. Materials and Methods of
10. Spur Gears 351
Screws.
Stress Concentration. 1. Introduction. 2. Fundamental Law of Toothed Gearing,
Matics of Involute Gear Teeth. 4. Cycloidal Gear Teeth,
Gear Teeth. 6. Standard System of Gearing. 7. Methods of Manufacture. 8. Transmitted or Horsepower Load. 9. Bendyig Capacity
In Spur Gear Teeth. 10. Form or Lewis Factors for Spur Teeth. 11.
Dynamic Load. 12. Limit Load for Wear. 13. Direct Calculation for
Diametral Pitch. 14. Number of Pairs of Teeth in Contact. 15.
Materials for Gears. 16. Determination of Tooth Loads. 17. Lubrication and Mounting of Gears. 18. Backlash. 19. Dimensioning of
Gears. 20. Undercutting in Gear Teeth. 21. Long and Short Addendum Gearing. 22. Internal or Annular Gears. 23. Speed Ratios of
Gear Trains. 24. Planetary Gear Trains.
3. Kinemanufacture. 5. Pitches of
6. Belts, Clutches, Brakes . 219
1. Forces in Flat Belts. 2. Action of Belt on Pulley. 3. Coefficient of
4. Design of Belts by Tables. 5.
6. Length of Belt. 7. V-belts. 8. Designing
When Pulleys Are of Unequal Diameters. 9. Disk Clutch. 10. Cone
Clutch. 11. Band Brakes. 12. Block Brake With “Short Shoe. 13.
Pivoted Block Brake With Long Shoe. 14. Brake With Pivoted Symmetrical Shoe. 15. Lining Pressures. 16. Heating of Brakes.
Friction and Working Stresses.
Pivoted Motor Drive.
11. Bevel, Worm and Helical Gears . 399
‘^ra/ght T0°th T* 1 Ge^s. 2. Beam Strength of Bevel Gears. 3.
Q -q
Orm Gears. 8. Geometric Relationships of Worm
10 of in.worm ^tooth Fkgear Loads I ^reductions 111and S^reng Efficiency ^. > 12 Dynamic .ofhelical Wormload Gears Gears , and .. 11 13 Wear .. Thermal Pitch of Worm Diameter Capacity Gears of.
15. Center Distance
7. Welded and Riveted Connections 263
1. Fabrication by Welding. 2. Fusion Welding. 3. Strength of
Fusion Welds. 4. Design Equations for Fillet Weld. 5. Stress Concentration in Welds. 6. Eccentrically Loaded Welds. 7. Resistance
Welding. 8. Soldering and Brazing. 9. Furnace Brazing. 10.
Riveted Joint With Central Load. 11. Stresses in Rivets. 12. Stresses
In Cylindrical Shell. 13. Riveted Joint With Eccentric Load. Helical Gear. 14. Formative Number of Teeth.( ( (
Contents
Of Mating Gears. 16. Solution When Shafts Are at Right Angles. 17.
Tooth Loads of Helical Gears. 18. Beam Strength, Dynamic Load, and
Wear of Helical Gears.
Xvi
12. Miscellaneous Machine Elements 430
1. Stresses in Thick Cylinder. 2. Shrink and Press Fit Stresses. 3.
Stress Concentration Caused by Press Fit. 4. Stresses in Disk Flywheel.
5. Flywheel With Spokes and Rim. 6. Flywheel Requirements. 7.
Impact of Elastic Bodies. 8. Force Produced by Falling Weight. 9.
Impact of Weight on Beam. 10. Gaskets and Seals. 11. Wire Rope.
12. Curved Beams. 13. Curved Beam of Rectangular Cross Section.
14. Curved Beam of Circular Cross Section. 15. Angular Deflection of
Curved Bar. 16. Cams. 17. Circular Arc Cams With Roller Follower.
18. Circular Arc Cam With Mushroom Follower. 19. Straight Sided
Cam With Roller Followers. 20. Roller Chains. 21. Snap Rings.
13« Dimensioning and Details 490
1. Dimensioning. 2. Redundant Dimensioning. 3. Dimensioning of
Cylindrical Fits. Maximum Metal. Minimum Metal. 4. Unilateral
And Bilateral Tolerances. 5. Selective Assembly. 6. Cumulative and
Noncumulative Tolerances. 7. Datum and Functional Surfaces. 8.
Dimensioning of Hole Centers. 9. Dimensioning of Tapers. 10. Positional Tolerances. 11. Concentricity. 12. Manufacturing and Gage
Tolerances. 13. Standardized Cylindrical Fits. 14. Production Process in Statistical Control. 15. Dimensioning of Assemblies. 16. Assembly of Parts With Loose Bolts. 17. Preferred Numbers. 18. Surface Roughness. 19. Detailing.
14. Engineering Materials 523
I. The Tension Test. 2. Physical Constitution of Steel. 3. Types of
Steel Used in Machine Construction. 4. Numbering Systems for Carbon and Alloy Steels. 5. Plain Carbon Steel. 6. Alloy Steels. 7.
High Strength Low Alloy Steel, Hsla. 8. Cost of Steel. 9. Heat
Treatment of Steel. 10. Residual Stresses From Heat Treatment.
Ii. Carburizing and Nitriding. 12. Flame Hardening. 13. Strain
Hardening. 14, Hardness. 15. Machinability. 16. Grain Size. 17.
Corrosion. Stainless Steel. 18. Wear. 19. Short-time Effects of
High Temperatures. 20. Creep of Steel at High Temperature. 21. Cast
Iron. 22. Cast Steel. 23. Tool Steel. 24. Aluminum Alloys. 25.
Magnesium Alloys. 26. Copper Alloys. 27. Alloys for Die Castings.
Index 5j5
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