| Description |
1 online resource |
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text rdacontent |
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computer rdamedia |
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online resource rdacarrier |
| Bibliography |
Includes bibliographical references and index. |
| Contents |
Intro -- The Mechanics of Threaded Fasteners and Bolted Joints for Engineering and Design -- Copyright -- Contents -- Preface -- List of symbols -- Chapter 1: Thread standards and forms -- 1.1. Brief history of screw threads and relevant research activities -- 1.2. Geometry and application purposes of screw threads -- 1.3. Standards of screw threads -- 1.3.1. Standard specifications of screw threads -- 1.3.2. Basic profile of screw threads -- 1.4. Thread pitch and number of threads -- 1.4.1. Mathematical expression of Helix -- 1.4.2. Coarse screw threads and fine screw threads -- 1.4.3. Number of threads and lead angle -- 1.4.4. Contact area between male and female threads -- 1.4.5. Nonsimilarity of threaded fasteners -- 1.5. Clamping configuration and various threaded fasteners -- 1.5.1. Bolt-nut connection and stud -- 1.5.2. Geometric factors affecting mechanical behavior of threaded fasteners -- 1.5.3. Contact pressure distribution at plate interface and shape of pressure cone -- 1.6. Strength, thermal and mechanical properties of threaded fastener materials -- 1.6.1. Materials used for threaded fasteners -- 1.6.2. Factors to consider in selecting materials -- Chapter 2: Fundamentals of threaded fasteners -- 2.1. Strength of threaded fasteners -- 2.1.1. Occurrence locations of rupture and failure of threaded fasteners -- 2.1.2. Strength in tightening process -- 2.1.3. Strength in service condition -- 2.1.4. Friction coefficients affecting mechanical behavior of bolted joints -- 2.2. Stiffness of threaded fasteners -- 2.2.1. Relationship between stiffness and mechanical behavior in bolted joints -- 2.2.2. Stiffness evaluation using one-dimensional spring elements -- 2.2.3. Equivalent lengths of engaged threads and bolt head -- 2.2.4. Compression stiffness of fastened plates. |
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2.2.5. Evaluation of spring constants composing a bolted joint by FEM -- 2.2.6. Relationship between mechanical behavior and spring constant of each part of a bolted joint -- 2.3. True profile of cross-section of screw threads -- 2.3.1. Cross-section of triangular screw threads [41] -- 2.3.2. Cross-section of screw threads of various shapes [42] -- 2.4. True cross-sectional area of screw threads -- 2.5. Finite element models with helical shape of screw threads -- 2.5.1. Previous modeling schemes of helical thread model -- Method-1 -- Method-2 -- Method-3 -- Method-4 -- 2.5.2. Helical thread modeling using mathematical expressions of cross-section [49] -- 2.6. Interface stiffness in bolted joints -- 2.6.1. Interface stiffness at mating surfaces -- 2.6.2. Interface stiffness in normal and tangential directions [56] -- 2.6.3. Simple formula for evaluating interface stiffness in normal direction -- 2.7. Thermal contact resistance in bolted joints -- Chapter 3: Mechanics of the tightening process of threaded fasteners -- 3.1. Summary of various tightening methods and comparison of tightening characteristics -- 3.2. Torque control method -- 3.2.1. Relationship between tightening torque and axial bolt force -- 3.2.2. Simple equation relating tightening torque to axial bolt force through the friction coefficient -- 3.2.3. Advantages of the torque control method and influencing factors on tightening accuracy -- Inclination of nut- or bolt head-bearing surface [69] -- Warping and flatness on plate surface -- 3.2.4. Self-locking criteria and efficiency of screw threads -- 3.2.5. Measuring method of axial bolt force, tightening torque, and friction coefficient -- 3.2.6. Behavior of torque and axial bolt force after releasing tightening torque -- 3.2.7. Simple strategy for reducing bolt force scatter [75]. |
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3.2.8. Tightening characteristics and strength of bottoming studs -- 3.2.9. Bolt strength in tightening process -- 3.3. Elastic angle control method -- 3.3.1. Tightening principle -- 3.3.2. Equation relating axial bolt force to nut rotation angle by taking account of surface roughness -- 3.3.3. Application range and tightening guidelines -- Suitable application range -- Guidelines for tightening operation -- 3.4. Direct tension method using hydraulic tensioner -- 3.4.1. Tightening principle -- 3.4.2. Effective tensile coefficient -- 3.4.3. Effects of surface roughness and nut rundown torque -- 3.4.4. Application range and tightening guidelines -- Suitable application range -- Guidelines for tightening operation -- 3.5. Thermal expansion method using bolt heater -- 3.5.1. Tightening principle [81] -- 3.5.2. Simplified model for evaluating tightening process -- 3.5.3. Equation relating axial bolt force to heating temperature [82] -- 3.5.4. Application range and tightening guidelines -- Suitable application range -- Guidelines for tightening operation -- 3.6. New tightening method utilizing real-time measurement of nut factor [85] -- 3.6.1. Development intention -- 3.6.2. Tightening principle -- 3.6.3. Verification of proposed method using prototype tightening device -- 3.7. Sequential tightening of multibolted joints and induced elastic interaction -- 3.7.1. Tightening operation of bolt-nut connections and elastic interaction -- 3.7.2. Effect of joint geometry on elastic interaction -- 3.7.3. Estimation of bolt force scatter and optimal tightening procedure -- 3.8. Energy required for tightening threaded fasteners -- 3.8.1. Tightening energy consumed in the torque control method [94] -- 3.8.2. Calculation of tightening energy for various influencing factors -- Chapter 4: Static and fatigue strengths of threaded fastener. |
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4.1. Load distribution and ratio of flank loads of engaged threads -- 4.1.1. Load distribution in bolt-nut connections -- 4.1.2. Load distribution in eyebolts and eyenuts -- 4.1.3. Analysis of ratio of flank loads by FEM -- 4.2. Static strength and stress concentration in threaded fasteners -- 4.2.1. Stress concentration and stress concentration factor -- 4.2.2. Stress concentration in threaded fasteners -- 4.2.3. Mechanism of stress concentration at thread root -- 4.2.4. Evaluation of stress concentration at thread root -- 4.2.5. Stress concentration and plastic deformation of threaded fasteners -- 4.2.6. Reduction strategy of stress concentration at thread root -- 4.3. Stress distribution along thread root -- 4.3.1. Stress concentration in bolt-nut connections -- 4.3.2. Effect of thread pitch and number of threads -- 4.3.3. Stress concentration of engaged threads in main body side -- 4.4. Fatigue failure of screw threads -- 4.4.1. Relationship between metal fatigue and stress amplitude -- 4.4.2. Fatigue failure of threaded fasteners -- 4.4.3. Influencing factors on fatigue strength of screw threads -- 4.5. Evaluation method of fatigue strength of threaded fasteners -- 4.5.1. Summary of the bolted joint diagram -- 4.5.2. Essential problems involved in the bolted joint diagram -- 4.5.3. Verification of bolted joint diagram by FEM -- 4.5.4. Axial bolt force vs external force diagram -- 4.5.5. Estimation method of fatigue strength and stress amplitude of threaded fasteners -- 4.6. Separation phenomena of plate Interface and stress amplitude -- 4.6.1. Stress amplitude in bolted joints under eccentric external load -- 4.6.2. Verification of interface separation phenomena by FEM -- 4.7. Stress amplitude along thread root -- 4.7.1. Finite element analysis using helical thread models -- 4.7.2. Stress amplitude and fatigue failure of bolt-nut connections. |
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4.7.3. Stress amplitude and fatigue failure of engaged threads in main body side [20] -- 4.7.4. Stress amplitude and plastic deformation [20] -- 4.8. Improvement measures of fatigue strength of threaded fasteners -- Chapter 5: Bolted joints under thermal load -- 5.1. Fundamentals of thermal and mechanical behaviors of bolted joints -- 5.1.1. Thermal deformation and thermal stress [120] -- 5.1.2. Mechanism of bolt force variation due to thermal load -- 5.1.3. Simple formula for calculating bolt force variation -- 5.2. Evaluation method of amount of heat transferred through contact surface -- 5.2.1. Measuring method of thermal contact coefficient -- 5.2.2. Thermal contact coefficient at interface composed of identical materials [122] -- 5.2.3. Thermal contact coefficient at interface composed of dissimilar materials [121] -- 5.3. Evaluation method of amount of heat transferred through a small gap [124] -- 5.4. Thermal contact coefficient and apparent thermal contact coefficient in bolted joints -- 5.5. Analysis of thermal and mechanical behaviors of bolted joints by FEM -- 5.5.1. Evaluation of thermal and mechanical behaviors using an axisymmetric FE model -- 5.5.2. Evaluation of thermal and mechanical behaviors using a three-dimensional FE model -- 5.6. Seizure of threaded fasteners -- 5.6.1. Conditions prone to seizure -- 5.6.2. Hypothesis proposed on seizure occurrence -- Chapter 6: Loosening of threaded fasteners -- 6.1. Rotation loosening and nonrotation loosening -- 6.2. Why bolted joints are easy to loosen -- 6.3. Bolt force reduction due to rotation loosening -- 6.3.1. Mechanism of rotation loosening -- 6.3.2. Bolt force reduction due to return rotation of nut -- 6.3.3. Prevention methods of rotation loosening -- 6.3.4. Finite element simulation of rotation loosening caused by repeated shear load. |
| Subject |
Bolted joints.
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Fasteners.
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Screw-threads.
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Assemblages à boulons.
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Attaches.
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Filetages.
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bolted joints.
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fasteners.
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Bolted joints
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Fasteners
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Screw-threads
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| Other Form: |
Print version : 9780323953573 |
| ISBN |
9780323953580 (e-book) |
|
0323953581 (e-book) |
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9780323953573 (pbk.) |
|
9780323953580 (ePub ebook) |
| Standard No. |
UKMGB 020773225 |
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