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 |  موضوع: كتاب Machine Elements in Mechanical Design الإثنين 05 نوفمبر 2018, 10:44 pm | |
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Machine Elements in Mechanical Design Sixth Edition
Robert L. Mott
University of Dayton
Edward M. Vavrek
Purdue University
Jyhwen Wang
Texas A&M University
ويتناول الموضوعات الأتية :
2–9 Tool Steels 51
2–10 Cast Iron 51
2–11 Powdered Metals 53
2–12 Aluminum 56
2–13 Zinc Alloys and Magnesium 58
2–14 Nickel-Based Alloys and Titanium 59
2–15 Copper, Brass, and Bronze 60
2–16 Plastics 61
2–17 Composite Materials 64
2–18 Materials Selection 76
References 81
Internet Sites Related to Design Properties of
Materials 82
Problems 83
Supplementary Problems 85
Internet-Based Assignments 86
3 Stress and Deformation Analysis 87
The Big Picture 87
You Are the Designer 88
3–1 Objectives of This Chapter 91
3–2 Philosophy of a Safe Design 91
3–3 Representing Stresses on a Stress
Element 92
3–4 Normal Stresses Due to Direct Axial
Load 93
3–5 Deformation Under Direct Axial
Load 94
3–6 Shear Stress due to Direct Shear Load 94
3–7 Torsional Load—Torque, Rotational
Speed, and Power 94
3–8 Shear Stress due to Torsional Load 96
3–9 Torsional Deformation 98
3–10 Torsion in Members Having Non-Circular
Cross Sections 98
3–11 Torsion in Closed, Thin-Walled
Tubes 100
3–12 Torsion in Open, Thin-Walled
Tubes 100
3–13 Shear Stress Due to Bending 102
Preface ix
Acknowledgments xv
PART 1 Principles of Design
and Stress Analysis 1
1 The Nature of Mechanical Design 2
The Big Picture 2
You Are the Designer 7
1–1 Objectives of This Chapter 8
1–2 The Design Process 8
1–3 Skills Needed in Mechanical Design 9
1–4 Functions, Design Requirements,
and Evaluation Criteria 10
1–5 Example of the Integration of Machine
Elements into a Mechanical Design 12
1–6 Computational Aids 13
1–7 Design Calculations 14
1–8 Preferred Basic Sizes, Screw Threads,
and Standard Shapes 14
1–9 Unit Systems 20
1–10 Distinction Among Weight, Force,
and Mass 21
References 22
Internet Sites for General Mechanical Design 22
Internet Sites for Innovation and Managing
Complex Design Projects 23
Problems 23
2 Materials in Mechanical Design 25
The Big Picture 25
You Are the Designer 26
2–1 Objectives of This Chapter 27
2–2 Properties of Materials 27
2–3 Classification of Metals and Alloys 39
2–4 Variabilty of Material Properties Data 43
2–5 Carbon and Alloy Steel 43
2–6 Conditions for Steels and Heat
Treatment 46
2–7 Stainless Steels 51
2–8 Structural Steel 51
CONTENTSviii Contents
22–14 Drum Brakes 768
22–15 Band Brakes 772
22–16 Other Types of Clutches and Brakes 773
References 775
Internet Sites for Clutches and Brakes 775
Problems 775
23 Design Projects 778
23–1 Objectives of This Chapter 778
23–2 Design Projects 778
List of Appendices 781
Appendix 1 Properties of Areas 782
Appendix 2 Preferred Basic Sizes and Screw
Threads 784
Appendix 3 Design Properties of Carbon and Alloy
Steels 787
Appendix 4 Properties of Heat-Treated Steels 789
Appendix 5 Properties of Carburized Steels 791
Appendix 6 Properties of Stainless Steels 792
Appendix 7 Properties of Structural Steels 793
Appendix 8 Design Properties of Cast Iron—U.S.
Units Basis 794
Appendix 8A Design Properties of Cast Iron—SI
Units Basis 795
Appendix 9 Typical Properties of Aluminum 796
Appendix 10–1 Properties of Die-Cast Zinc
Alloys 797
Appendix 10–2 Properties of Die-Cast Magnesium
Alloys 797
Appendix 11–1 Properties of Nickel-Based
Alloys 798
Appendix 11–2 Properties of Titanium Alloys 798
Appendix 12 Properties of Bronzes, Brasses, and
Other Copper Alloys 799
Appendix 13 Typical Properties of Selected
Plastics 800
Appendix 14 Beam-Deflection Formulas 801
Appendix 15 Commercially Available Shapes Used
For Load-Carrying Members 809
Appendix 16 Conversion Factors 829
Appendix 17 Hardness Conversion Table 830
Appendix 18 Stress Concentration Factors 831
Appendix 19 Geometry Factor, I, for Pitting for
Spur Gears 834
Answers to Selected Problems 837
Index 848
21 Electric Motors and Controls 723
The Big Picture 723
You Are the Designer 725
21–1 Objectives of This Chapter 725
21–2 Motor Selection Factors 725
21–3 AC Power and General Information about
AC Motors 726
21–4 Principles of Operation of AC Induction
Motors 727
21–5 AC Motor Performance 728
21–6 Three-Phase, Squirrel-Cage Induction
Motors 729
21–7 Single-Phase Motors 731
21–8 AC Motor Frame Types and
Enclosures 733
21–9 Controls for AC Motors 735
21–10 DC Power 742
21–11 DC Motors 742
21–12 DC Motor Control 744
21–13 Other Types of Motors 744
References 746
Internet Sites for Electric Motors and
Controls 746
Problems 747
22 Motion Control: Clutches and
Brakes 749
The Big Picture 749
You Are the Designer 751
22–1 Objectives of This Chapter 751
22–2 Descriptions of Clutches and Brakes 751
22–3 Types of Friction Clutches and
Brakes 751
22–4 Performance Parameters 756
22–5 Time Required to Accelerate or Decelerate
a Load 758
22–6 Inertia of a System Referred to the Clutch
Shaft Speed 760
22–7 Effective Inertia for Bodies Moving
Linearly 761
22–8 Energy Absorption: Heat-Dissipation
Requirements 762
22–9 Response Time 762
22–10 Friction Materials and Coefficient of
Friction 764
22–11 Plate-Type Clutch or Brake 765
22–12 Caliper Disc Brakes 767
22–13 Cone Clutch or Brake 767
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