Page 10 - Analysis and Design of Machine Elements

Contents
viii
5.2 Welding 109
5.2.1 Applications, Characteristics and Structure 109
5.2.2 Types of Welded Joints and Types of Welds 110
5.2.3 Strength Analysis 110
5.2.3.1 Butt Welds 111
5.2.3.2 Fillet Welds 111
5.2.4 Design of Welded Joints 112
5.3 Brazing, Soldering and Adhesive Bonding 113
5.3.1 Applications, Characteristics and Structure 113
5.3.2 Types of Adhesive and Their Selection 113
5.3.3 Analysis and Design of Adhesive Joints 114
References 115
Problems 115

6 Belt Drives 119
6.1 Introduction 120
6.1.1 Applications, Characteristics and Structures 120
6.1.2 Types of Belts 121
6.1.3 V-Belts 123
6.1.3.1 Terminology and Dimensions of V-Belts 123
6.1.3.2 Types of V-Belts 123
6.1.3.3 V-Belt Construction 123
6.2 Working Condition Analysis 124
6.2.1 Geometrical Relationships in Belt Drives 124
6.2.2 Force Analysis 125
6.2.2.1 Force Analysis of an Element of Belt 126
6.2.2.2 Relations Between Tight Tension F , Slack Tension F , Initial Tension F and
1
0
2
Effective Tension F e 126
6.2.2.3 Critical or Maximum Effective Tension, F ec 127
6.2.2.4 Centrifugal Tension, F 128
c
6.2.3 Kinematic Analysis 128
6.2.3.1 Elastic Creep 128
6.2.3.2 Slippage of Belts 129
6.2.3.3 Speed Ratio 129
6.2.4 Stress Analysis 130
6.2.4.1 Tensile Stress in Tight Side, , and Slack Side, 130
1 2
6.2.4.2 Centrifugal Stress, 130
c
6.2.4.3 Bending Stress, 130
b
6.2.5 Potential Failure Modes 131
6.3 Power Transmission Capacities 131
6.3.1 The Maximum Effective Tension 131
6.3.2 Power Transmission Capacity of a Single V-Belt 132
6.3.2.1 The Basic Power Rating of a Single Standard V-Belt, P 0 132
6.3.2.2 The Actual Power Rating of a Single V-Belt, P r 132
6.4 Design of Belt Drives 135
6.4.1 Introduction 135
6.4.2 Design Criteria 135