Mechanics of Aircraft Structures
Designed to help students get a solid background in structural mechanics and extensively updated to help professionals get up to speed on recent advances\ This Second Edition of the bestselling textbook Mechanics of Aircraft Structures combines fundamentals, an overview of new materials, and rigorous analysis tools into an excellent one-semester introductory course in structural mechanics and aerospace engineering. It's also extremely useful to practicing aerospace or mechanical engineers who...
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Designed to help students get a solid background in structural mechanics and extensively updated to help professionals get up to speed on recent advances This Second Edition of the bestselling textbook Mechanics of Aircraft Structures combines fundamentals, an overview of new materials, and rigorous analysis tools into an excellent one-semester introductory course in structural mechanics and aerospace engineering. It's also extremely useful to practicing aerospace or mechanical engineers who want to keep abreast of new materials and recent advances. Updated and expanded, this hands-on reference covers: * Introduction to elasticity of anisotropic solids, including mechanics of composite materials and laminated structures * Stress analysis of thin-walled structures with end constraints * Elastic buckling of beam-column, plates, and thin-walled bars * Fracture mechanics as a tool in studying damage tolerance and durability Designed and structured to provide a solid foundation in structural mechanics, Mechanics of Aircraft Structures, Second Edition includes more examples, more details on some of the derivations, and more sample problems to ensure that students develop a thorough understanding of the principles.
PrefacexiiiPreface to the First Editionxv1Characteristics of Aircraft Structures and Materials11.1Introduction11.2Basic Structural Elements in Aircraft Structure21.2.1Axial Member21.2.2Shear Panel41.2.3Bending Member (Beam)51.2.4Torsion Member71.3Wing and Fuselage81.3.1Load Transfer91.3.2Wing Structure101.3.3Fuselage111.4Aircraft Materials12Problems172Introduction to Elasticity192.1Concept of Displacement192.2Strain212.3Stress252.4Equations of Equilibrium in a Nonuniform Stress Field282.5Principal Stress312.6Shear Stress342.7Revisit of Transformation of Stress362.8Linear Stress-Strain Relations382.8.1Strains Induced by Normal Stress392.8.2Strains Induced by Shear Stress422.8.3Three-Dimensional Stress-Strain Relations432.9Elastic Strain Energy472.10Plane Elasticity492.10.1Stress-Strain Relations for Plane Isotropic Solids502.10.2Stress-Strain Relations for Orthotropic Solids in Plane Stress532.10.3Governing Equations542.10.4Solution by Airy Stress Function for Plane Isotropic Solids56Problems573Torsion633.1Saint-Venant's Principle633.2Torsion of Uniform Bars673.3Bars with Circular Cross-Sections743.4Bars with Narrow Rectangular Cross-Sections773.5Closed Single-Cell Thin-Walled Sections813.6Multicell Thin-Walled Sections913.7Warping in Open Thin-Walled Sections963.8Warping in Closed Thin-Walled Sections1013.9Effect of End Constraints103Problems1104Bending and Flexural Shear1154.1Derivation of the Simple (Bernoulli-Euler) Beam Equation1154.2Bidirectional Bending1204.3Transverse Shear Stress due to Transverse Force in Symmetric Sections1284.3.1Narrow Rectangular Cross-Section1284.3.2General Symmetric Sections1304.3.3Thin-Walled Sections1324.3.4Shear Deformation in Thin-Walled Sections1334.4Timoshenko Beam Theory1364.5Shear Lag140Problems1445Flexural Shear Flow in Thin-Walled Sections1495.1Flexural Shear Flow in Open Thin-Walled Sections1495.1.1Symmetric Thin-Walled Sections1505.1.2Unsymmetric Thin-Walled Sections1555.1.3Multiple Shear Flow Junctions1575.1.4Selection of Shear Flow Contour1585.2Shear Center in Open Sections1595.3Closed Thin-Walled Sections and Combined Flexural and Torsional Shear Flow1655.3.1Shear Center1655.3.2Statically Determinate Shear Flow1715.4Closed Multicell Sections173Problems1776Failure Criteria for Isotropic Materials1836.1Strength Criteria for Brittle Materials1836.1.1Maximum Principal Stress Criterion1846.1.2Coulomb-Mohr Criterion1846.2Yield Criteria for Ductile Materials1866.2.1Maximum Shear Stress Criterion (Tresca Yield Criterion) in Plane Stress1876.2.2Maximum Distortion Energy Criterion (von Mises Yield Criterion)1886.3Fracture Mechanics1936.3.1Stress Concentration1936.3.2Concept of Cracks and Strain Energy Release Rate1946.3.3Fracture Criterion1966.4Stress Intensity Factor2016.4.1Symmetric Loading (Mode I Fracture)2016.4.2Antisymmetric Loading (Mode II Fracture)2046.4.3Relation between K and G2066.4.4Mixed Mode Fracture2106.5Effect of Crack Tip Plasticity2116.6Fatigue Failure2146.6.1Constant Stress Amplitude2156.6.2S-N Curves2156.6.3Variable Amplitude Loading2166.7Fatigue Crack Growth217Problems2197Elastic Buckling2257.1Eccentrically Loaded Beam-Column2257.2Elastic Buckling of Straight Bars2277.2.1Pinned-Pinned Bar2287.2.2Clamped-Free Bar2317.2.3Clamped-Pinned Bar2327.2.4Clamped-Clamped Bar2347.2.5Effective Length of Buckling2357.3Initial Imperfection2367.4Postbuckling Behavior2387.5Bar of Unsymmetric Section2447.6Torsional-Flexural Buckling of Thin-Walled Bars2467.6.1Nonuniform Torsion2467.6.2Torsional Buckling of Doubly Symmetric Section2487.6.3Torsional-Flexural Buckling2517.7Elastic Buckling of Flat Plates2567.7.1Governing Equation for Flat Plates2567.7.2Cylindrical Bending2587.7.3Buckling of Rectangular Plates2597.7.4Buckling under Shearing Stresses2637.8Local Buckling of Open Sections264Problems2668Analysis of Composite Laminates2718.1Plane Stress Equations for Composite Lamina2718.2Off-Axis Loading2778.3Notation for Stacking Sequence in Laminates2808.4Symmetric Laminate under In-Plane Loading2828.5Effective Moduli for Symmetric Laminates2858.6Laminar Stresses2888.7[plus or minus degree] Laminate290Problems292Index295
