Cover image for Design and analysis of composite structures : with applications to aerospace structures
Title:
Design and analysis of composite structures : with applications to aerospace structures
Personal Author:
Series:
AIAA education series
Edition:
1st ed.
Publication Information:
Reston, Va. : American Institute of Aeronautics and Astronautics ; United Kingdom : b John Wiley & Sons, 2010
Physical Description:
p. cm.
ISBN:
9780470972632

9781600867804

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Material Type
Item Category 1
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30000010237050 TL699.C57 K37 2010 Open Access Book Book
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Summary

Summary

Design and Analysis of Composite Structures enables graduate students and engineers to generate meaningful and robust designs of complex composite structures. Combining analysis and design methods for structural components, the book begins with simple topics such as skins and stiffeners and progresses through to entire components of fuselages and wings.

Starting with basic mathematical derivation followed by simplifications used in real-world design, Design and Analysis of Composite Structures presents the level of accuracy and range of applicability of each method. Examples taken from actual applications are worked out in detail to show how the concepts are applied, solving the same design problem with different methods based on different drivers (e.g. cost or weight) to show how the final configuration changes as the requirements and approach change.

Provides a toolkit of analysis and design methods to most situations encountered in practice, as well as analytical frameworks and the means to solving them for tackling less frequent problems. Presents solutions applicable to optimization schemes without having to run finite element models at each iteration, speeding up the design process and allowing examination of several more alternatives than traditional approaches. Includes guidelines showing how decisions based on manufacturing considerations affect weight and how weight optimization may adversely affect the cost. Accompanied by a website at www.wiley.com/go/kassapoglou hosting lecture slides and solutions to the exercises for instructors.


Table of Contents

About the Authorp. ix
Series Prefacep. x
Prefacep. xi
1 Applications of Advanced Composites in Aircraft Structuresp. 1
Referencesp. 7
2 Cost of Composites: a Qualitative Discussionp. 9
2.1 Recurring Costp. 10
2.2 Nonrecurring Costp. 18
2.3 Technology Selectionp. 20
2.4 Summary and Conclusionsp. 27
Exercisesp. 30
Referencesp. 30
3 Review of Classical Laminated Plate Theoryp. 33
3.1 Composite Materials: Definitions, Symbols and Terminologyp. 33
3.2 Constitutive Equations in Three Dimensionsp. 35
3.2.1 Tensor Transformationsp. 37
3.3 Constitutive Equations in Two Dimensions: Plane Stressp. 39
Exercisesp. 52
Referencesp. 53
4 Review of Laminate Strength and Failure Criteriap. 55
4.1 Maximum Stress Failure Theoryp. 57
4.2 Maximum Strain Failure Theoryp. 58
4.3 Tsai-Hill Failure Theoryp. 58
4.4 Tsai-Wu Failure Theoryp. 59
4.5 Other Failure Theoriesp. 59
Referencesp. 60
5 Composite Structural Components and Mathematical Formulationp. 63
5.1 Overview of Composite Airframep. 63
5.1.1 The Structural Design Process: The Analyst's Perspectivep. 64
5.1.2 Basic Design Concept and Process/Material Considerations for Aircraft Partsp. 69
5.1.3 Sources of Uncertainty: Applied Loads, Usage and Material Scatterp. 72
5.1.4 Environmental Effectsp. 75
5.1.5 Effect of Damagep. 76
5.1.6 Design Values and Allowablesp. 78
5.1.7 Additional Considerations of the Design Processp. 81
5.2 Governing Equationsp. 82
5.2.1 Equilibrium Equationsp. 82
5.2.2 Stress-Strain Equationsp. 84
5.2.3 Strain-Displacement Equationsp. 85
5.2.4 von Karman Anisotropic Plate Equations for Large Deflectionsp. 86
5.3 Reductions of Governing Equations: Applications to Specific Problemsp. 91
5.3.1 Composite Plate Under Localized in-Plane Loadp. 92
5.3.2 Composite Plate Under Out-of-Plane Point Loadp. 103
5.4 Energy Methodsp. 106
5.4.1 Energy Expressions for Composite Platesp. 107
Exercisesp. 113
Referencesp. 116
6 Buckling of Composite Platesp. 119
6.1 Buckling of Rectangular Composite Plate under Biaxial Loadingp. 119
6.2 Buckling of Rectangular Composite Plate under Uniaxial Compressionp. 122
6.2.1 Uniaxial Compression, Three Sides Simply Supported, One Side Freep. 124
6.3 Buckling of Rectangular Composite Plate under Shearp. 127
6.4 Buckling of Long Rectangular Composite Plates under Shearp. 129
6.5 Buckling of Rectangular Composite Plates under Combined Loadsp. 132
6.6 Design Equations for Different Boundary Conditions and Load Combinationsp. 138
Exercisesp. 141
Referencesp. 143
7 Post-Bucklingp. 145
7.1 Post-Buckling Analysis of Composite Panels under Compressionp. 149
7.1.1 Application: Post-Buckled Panel Under Compressionp. 157
7.2 Post-Buckling Analysis of Composite Plates under Shearp. 159
7.2.1 Post-buckling of Stiffened Composite Panels under Shearp. 163
7.2.2 Post-buckling of Stiffened Composite Panels under Combined Uniaxial and Shear Loadingp. 171
Exercisesp. 174
Referencesp. 177
8 Design and Analysis of Composite Beamsp. 179
8.1 Cross-section Definition Based on Design Guidelinesp. 179
8.2 Cross-sectional Propertiesp. 182
8.3 Column Bucklingp. 188
8.4 Beam on an Elastic Foundation under Compressionp. 189
8.5 Cripplingp. 194
8.5.1 One-Edge-Free (OEF) Cripplingp. 196
8.5.2 No-Edge-Free (NEF) Cripplingp. 200
8.5.3 Crippling under Bending Loadsp. 202
8.5.4 Crippling of Closed-Section Beamsp. 207
8.6 Importance of Radius Regions at Flange Intersectionsp. 207
8.7 Inter-rivet Buckling of Stiffener Flangesp. 210
8.8 Application: Analysis of Stiffeners in a Stiffened Panel under Compressionp. 215
Exercisesp. 218
Referencesp. 222
9 Skin-Stiffened Structurep. 223
9.1 Smearing of Stiffness Properties (Equivalent Stiffness)p. 223
9.1.1 Equivalent Membrane Stiffnessesp. 223
9.1.2 Equivalent Bending Stiffnessesp. 225
9.2 Failure Modes of a Stiffened Panelp. 227
9.2.1 Local Buckling (Between Stiffeners) Versus Overall Panel Buckling (the Panel Breaker Condition)p. 228
9.2.2 Skin-Stiffener Separationp. 236
9.3 Additional Considerations for Stiffened Panelsp. 251
9.3.1 'Pinching' of Skinp. 251
9.3.2 Co-Curing Versus Bonding Versus Fasteningp. 251
Exercisesp. 253
Referencesp. 258
10 Sandwich Structurep. 259
10.1 Sandwich Bending Stiffnessesp. 260
10.2 Buckling of Sandwich Structurep. 262
10.2.1 Buckling of Sandwich Under Compressionp. 262
10.2.2 Buckling of Sandwich Under Shearp. 264
10.2.3 Buckling of Sandwich Under Combined Loadingp. 265
10.3 Sandwich Wrinklingp. 265
10.3.1 Sandwich Wrinkling Under Compressionp. 265
10.3.2 Sandwich Wrinkling Under Shearp. 276
10.3.3 Sandwich Wrinkling Under Combined Loadsp. 276
10.4 Sandwich Crimpingp. 278
10.4.1 Sandwich Crimping Under Compressionp. 278
10.4.2 Sandwich Crimping Under Shearp. 278
10.5 Sandwich Intracellular Buckling (Dimpling) under Compressionp. 278
10.6 Attaching Sandwich Structuresp. 279
10.6.1 Core Ramp-Down Regionsp. 280
10.6.2 Alternatives to Core Ramp-Downp. 282
Exercisesp. 284
Referencesp. 288
11 Good Design Practices and Design 'Rules of Thumb'p. 289
11.1 Lay up/Stacking Sequence-relatedp. 289
11.2 Loading and Performance-relatedp. 290
11.3 Guidelines Related to Environmental Sensitivity and Manufacturing Constraintsp. 292
11.4 Configuration and Layout-relatedp. 292
Exercisesp. 294
Referencesp. 295
Indexp. 297