Details

Mechanics of Aircraft Structures


Mechanics of Aircraft Structures


3. Aufl.

von: C. T. Sun, Ashfaq Adnan

111,99 €

Verlag: Wiley
Format: EPUB
Veröffentl.: 21.09.2021
ISBN/EAN: 9781119584148
Sprache: englisch
Anzahl Seiten: 320

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Beschreibungen

MECHANICS OF <b>AIRCRAFT</b> STRUCTURES <p><b>Explore the most up-to-date overview of the foundations of aircraft structures combined with a review of new aircraft materials</b> <p>The newly revised Third Edition of <i>Mechanics of Aircraft Structures</i> delivers a combination of the fundamentals of aircraft structure with an overview of new materials in the industry and a collection of rigorous analysis tools into a single one-stop resource. Perfect for a one-semester introductory course in structural mechanics and aerospace engineering, the distinguished authors have created a textbook that is also ideal for mechanical or aerospace engineers who wish to stay updated on recent advances in the industry. <p>The new edition contains new problems and worked examples in each chapter and improves student accessibility. A new chapter on aircraft loads and new material on elasticity and structural idealization form part of the expanded content in the book. Readers will also benefit from the inclusion of: <ul><li>A thorough introduction to the characteristics of aircraft structures and materials, including the different types of aircraft structures and their basic structural elements</li> <li>An exploration of load on aircraft structures, including loads on wing, fuselage, landing gear, and stabilizer structures</li> <li>An examination of the concept of elasticity, including the concepts of displacement, strain, and stress, and the equations of equilibrium in a nonuniform stress field</li> <li>A treatment of the concept of torsion</li></ul> <p>Perfect for senior undergraduate and graduate students in aerospace engineering, <i>Mechanics of Aircraft Structures</i> will also earn a place in the libraries of aerospace engineers seeking a one-stop reference to solidify their understanding of the fundamentals of aircraft structures and discover an overview of new materials in the field.
<p>Preface to the Third Edition xiii</p> <p>Preface to the Second Edition xv</p> <p>Preface to the First Edition xvii</p> <p>About the Companion Website xix</p> <p><b>1 Characteristics of Aircraft Structures and Materials 1</b></p> <p>1.1 Introduction, 1</p> <p>1.2 Types of Aircraft Structures, 1</p> <p>1.2.1 Fixed-Wing Aircraft, 2</p> <p>1.2.2 Rotorcraft, 2</p> <p>1.2.3 Lighter-than-Air Vehicles, 2</p> <p>1.2.4 Drones, 2</p> <p>1.3 Basic Structural Elements in Aircraft Structure, 3</p> <p>1.3.1 Fuselage, 3</p> <p>1.3.2 Wing, 3</p> <p>1.3.3 Landing Gear, 4</p> <p>1.3.4 Control Surfaces, 4</p> <p>1.4 Aircraft Materials, 5</p> <p>1.4.1 Steel Alloys, 5</p> <p>1.4.2 Aluminum Alloys, 6</p> <p>1.4.3 Titanium Alloys, 6</p> <p>1.4.4 Fiber-Reinforced Composites, 6</p> <p>Problems, 7</p> <p><b>2 Loads on Aircraft Structures 9</b></p> <p>2.1 Introduction, 9</p> <p>2.2 Basic Structural Elements, 9</p> <p>2.2.1 Axial Member, 9</p> <p>2.2.2 Shear Panel, 11</p> <p>2.2.3 Bending Member (Beam), 12</p> <p>2.2.4 Torsion Member, 13</p> <p>2.3 Wing and Fuselage, 15</p> <p>2.3.1 Load Transfer, 15</p> <p>2.3.2 Wing Structure, 16</p> <p>2.3.3 Fuselage, 17</p> <p>Problems, 20</p> <p><b>3 Introduction to Elasticity 23</b></p> <p>3.1 Introduction, 23</p> <p>3.2 Concept of Displacement, 24</p> <p>3.3 Strain, 26</p> <p>3.3.1 Rigid Body Motion, 28</p> <p>3.4 Stress, 30</p> <p>3.5 Equations of Equilibrium in a Uniform Stress Field, 31</p> <p>3.6 Equations of Equilibrium in a Nonuniform Stress Field, 33</p> <p>3.7 Stress Vector and Stress Components Relations, 35</p> <p>3.8 Principal Stress, 37</p> <p>3.9 Shear Stress, 40</p> <p>3.10 Stress Transformation, 41</p> <p>3.11 Linear Stress–Strain Relations, 44</p> <p>3.11.1 Strains Induced by Normal Stress, 45</p> <p>3.11.2 Strains Induced by Shear Stress, 47</p> <p>3.11.3 Three-Dimensional Stress–Strain Relations, 47</p> <p>3.11.3.1 Orthotropic Materials, 49</p> <p>3.11.3.2 Isotropic Materials, 50</p> <p>3.12 Plane Elasticity, 51</p> <p>3.12.1 Stress–Strain Relations for Plane Isotropic Solids, 52</p> <p>3.12.1.1 Plane Strain, 52</p> <p>3.12.1.2 Plane Stress, 53</p> <p>3.12.2 Stress–Strain Relations for Orthotropic Solids in Plane Stress, 54</p> <p>3.12.3 Governing Equations, 55</p> <p>3.12.3.1 Equilibrium Equations, 55</p> <p>3.12.3.2 Boundary Conditions, 55</p> <p>3.12.3.3 Compatibility Equation, 56</p> <p>3.12.4 Solution by Airy Stress Function for Plane Isotropic Solids, 57</p> <p>3.12.5 Plane Elasticity Solutions in Polar Coordinate System, 59</p> <p>3.12.5.1 Strain–Displacement Relations, 59</p> <p>3.12.5.2 Stresses in Polar Coordinates and Equilibrium Equations, 60</p> <p>3.12.5.3 Stress–Strain Relations, 61</p> <p>3.12.5.4 Stress Function Formulations, 61</p> <p>3.13 Formulations Beyond 2-D Plane Elasticity, 62</p> <p>Problems, 64</p> <p>References, 71</p> <p><b>4 Torsion 73</b></p> <p>4.1 Introduction, 73</p> <p>4.2 Torsion of Uniform Bars With Arbitrary Cross-Section, 73</p> <p>4.2.1 Governing Equations, 74</p> <p>4.2.2 Boundary Conditions, 76</p> <p>4.2.3 Torque–Stress Relations, 77</p> <p>4.2.4 Warping Displacement, 78</p> <p>4.2.5 Torsion Constant, 79</p> <p>4.3 Bars With Circular Cross-Sections, 79</p> <p>4.3.1 Elasticity Approach Using Prandtl Stress Function, 79</p> <p>4.3.2 Mechanics of Solid Approach, 82</p> <p>4.4 Bars With Narrow Rectangular Cross-Sections, 85</p> <p>4.5 Closed Single-Cell Thin-Walled Sections, 88</p> <p>4.5.1 The s–n Coordinate System, 88</p> <p>4.5.2 Prandtl Stress Function, 90</p> <p>4.5.3 Shear Flow q, 91</p> <p>4.5.4 Shear Flow–Torque Relation, 91</p> <p>4.5.5 Twist Angle, 93</p> <p>4.5.5.1 Method 1, 93</p> <p>4.5.5.2 Method 2 for Constant Shear Flow, 94</p> <p>4.5.6 Torsion Constant J, 95</p> <p>4.6 Multicell Thin-Walled Sections, 98</p> <p>4.7 Warping in Open Thin-Walled Sections, 102</p> <p>4.8 Warping in Closed Thin-Walled Sections, 106</p> <p>4.9 Effect of End Constraints, 108</p> <p>Problems, 114</p> <p>References, 119</p> <p><b>5 Bending and Flexural Shear 121</b></p> <p>5.1 Introduction, 121</p> <p>5.2 Bernoulli–Euler Beam Theory, 121</p> <p>5.2.1 Unidirectional Bending on Beams with a Symmetric Section, 121</p> <p>5.2.2 Bidirectional Bending on Beams with an Arbitrary Section, 127</p> <p>5.3 Structural Idealization, 131</p> <p>5.4 Transverse Shear Stress Due to Transverse Force in Symmetric Sections, 139</p> <p>5.4.1 Narrow Rectangular Cross-Section, 139</p> <p>5.4.2 General Symmetric Sections, 141</p> <p>5.4.3 Thin-Walled Sections, 142</p> <p>5.4.4 Shear Deformation in Thin-Walled Sections, 143</p> <p>5.5 Timoshenko Beam Theory, 146</p> <p>5.6 Saint-Venant’s principle, 149</p> <p>5.7 Shear Lag, 152</p> <p>Problems, 155</p> <p>Reference, 160</p> <p><b>6 Flexural Shear Flow in Thin-Walled Sections 161</b></p> <p>6.1 Introduction, 161</p> <p>6.2 Flexural Shear Flow in Open Thin-Walled Sections, 161</p> <p>6.2.1 Symmetric Thin-Walled Sections, 161</p> <p>6.2.1.1 Stringer–Web Sections, 164</p> <p>6.2.2 Unsymmetric Thin-Walled Sections, 166</p> <p>6.2.3 Multiple Shear Flow Junctions, 168</p> <p>6.2.4 Selection of Shear Flow Contour, 169</p> <p>6.3 Shear Center in Open Sections, 169</p> <p>6.4 Closed Thin-Walled Sections and Combined Flexural and Torsional Shear Flow, 175</p> <p>6.4.1 Shear Center, 176</p> <p>6.4.2 Statically Determinate Shear Flow, 179</p> <p>6.5 Closed Multicell Sections, 182</p> <p>Problems, 186</p> <p><b>7 Failure Criteria for Isotropic Materials 193</b></p> <p>7.1 Introduction, 193</p> <p>7.2 Strength Criteria for Brittle Materials, 193</p> <p>7.2.1 Maximum Principal Stress Criterion, 193</p> <p>7.2.2 Coulomb–Mohr Criterion, 194</p> <p>7.3 Yield Criteria for Ductile Materials, 196</p> <p>7.3.1 Maximum Shear Stress Criterion (Tresca Yield Criterion) in Plane Stress, 196</p> <p>7.3.2 Maximum Distortion Energy Criterion (von Mises Yield Criterion), 197</p> <p>7.4 Fracture Mechanics, 203</p> <p>7.4.1 Stress Concentration, 203</p> <p>7.4.2 Concept of Cracks and Strain Energy Release Rate, 204</p> <p>7.4.3 Fracture Criterion, 205</p> <p>7.4.3.1 Strain Energy in Structural Members, 205</p> <p>7.4.3.2 Axial Element, 206</p> <p>7.4.3.3 Beam Element, 206</p> <p>7.4.3.4 Torsion Member, 206</p> <p>7.5 Stress Intensity Factor, 210</p> <p>7.5.1 Symmetric Loading (Mode I Fracture), 210</p> <p>7.5.2 Antisymmetric Loading (Mode II Fracture), 212</p> <p>7.5.3 Relation between K and G, 213</p> <p>7.5.4 Mixed Mode Fracture, 217</p> <p>7.6 Effect of Crack Tip Plasticity, 218</p> <p>7.7 Fatigue Failure, 220</p> <p>7.7.1 Constant Stress Amplitude, 220</p> <p>7.7.2 S–N Curves, 221</p> <p>7.7.3 Variable Amplitude Loading, 221</p> <p>7.8 Fatigue Crack Growth, 222</p> <p>Problems, 224</p> <p>References, 228</p> <p><b>8 Elastic Buckling 229</b></p> <p>8.1 Introduction, 229</p> <p>8.2 Eccentrically Loaded Beam-Column, 229</p> <p>8.3 Elastic Buckling of Straight Bars, 230</p> <p>8.3.1 Pinned–Pinned Bar, 232</p> <p>8.3.2 Clamped–Free Bar, 235</p> <p>8.3.3 Clamped–Pinned Bar, 236</p> <p>8.3.4 Clamped–Clamped Bar, 237</p> <p>8.3.5 Effective Length of Buckling, 238</p> <p>8.4 Initial Imperfection, 239</p> <p>8.5 Postbuckling Behavior, 241</p> <p>8.6 Bar of Unsymmetric Section, 246</p> <p>8.7 Torsional–Flexural Buckling of Thin-Walled Bars, 248</p> <p>8.7.1 Nonuniform Torsion, 248</p> <p>8.7.2 Torsional Buckling of Doubly Symmetric Section, 249</p> <p>8.7.3 Torsional–Flexural Buckling, 252</p> <p>8.8 Elastic Buckling of Flat Plates, 256</p> <p>8.8.1 Governing Equation for Flat Plates, 256</p> <p>8.8.1.1 Boundary Conditions, 257</p> <p>8.8.1.2 Clamped Edge, 258</p> <p>8.8.1.3 Simply Supported Edge, 258</p> <p>8.8.1.4 Free Edge, 258</p> <p>8.8.2 Cylindrical Bending, 258</p> <p>8.8.3 Buckling of Rectangular Plates, 259</p> <p>8.8.3.1 Simply Supported Edges, 259</p> <p>8.8.3.2 Other Boundary Conditions, 262</p> <p>8.8.4 Buckling Under Shearing Stresses, 262</p> <p>8.9 Local Buckling of Open Sections, 263</p> <p>Problems, 265</p> <p><b>9 Analysis of Composite Laminates 271</b></p> <p>9.1 Plane Stress Equations for Composite Lamina, 271</p> <p>9.2 Off-Axis Loading, 276</p> <p>9.3 Notation for Stacking Sequence in Laminates, 278</p> <p>9.3.1 Symmetry, 279</p> <p>9.3.2 Repetition, 279</p> <p>9.4 Symmetric Laminate Under In-Plane Loading, 279</p> <p>9.5 Effective Moduli for Symmetric Laminates, 281</p> <p>9.5.1 Quasi-Isotropic Laminate, 283</p> <p>9.6 Laminar Stresses, 284</p> <p>9.7 [±45 ] Laminate, 286</p> <p>9.7.1 Determination of G 12 Using ±45 Laminates, 287</p> <p>Problems, 288</p> <p>Index 291</p>
<p><b>C. T. Sun, PhD,</b> is Neil A. Armstrong Distinguished Professor Emeritus of Aeronautics and Astronautics at Purdue University. Dr. Sun was the inaugural recipient of the AIAA-ASC James H. Starnes Award and the 2007 ASME Warner T. Koiter Medal.</p> <p><b>Ashfaq Adnan, PhD,</b> is Professor in the Mechanical and Aerospace Engineering Department at the University of Texas at Arlington and a Fellow of ASME. His research focus is on deformation, damage, and failure of biological, bioinspired, and engineered materials at multiple length scales.
<p><b>Explore the most up-to-date overview of the foundations of aircraft structures combined with a review of new aircraft materials</b></p> <p>The newly revised Third Edition of <i>Mechanics of Aircraft Structures</i> delivers a combination of the fundamentals of aircraft structure with an overview of new materials in the industry and a collection of rigorous analysis tools into a single one-stop resource. Perfect for a one-semester introductory course in structural mechanics and aerospace engineering, the distinguished authors have created a textbook that is also ideal for mechanical or aerospace engineers who wish to stay updated on recent advances in the industry. <p>The new edition contains new problems and worked examples in each chapter and improves student accessibility. A new chapter on aircraft loads and new material on elasticity and structural idealization form part of the expanded content in the book. Readers will also benefit from the inclusion of: <ul><li>A thorough introduction to the characteristics of aircraft structures and materials, including the different types of aircraft structures and their basic structural elements</li> <li>An exploration of load on aircraft structures, including loads on wing, fuselage, landing gear, and stabilizer structures</li> <li>An examination of the concept of elasticity, including the concepts of displacement, strain, and stress, and the equations of equilibrium in a nonuniform stress field</li> <li>A treatment of the concept of torsion</li></ul> <p>Perfect for senior undergraduate and graduate students in aerospace engineering, <i>Mechanics of Aircraft Structures</i> will also earn a place in the libraries of aerospace engineers seeking a one-stop reference to solidify their understanding of the fundamentals of aircraft structures and discover an overview of new materials in the field.

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