Mechanics of Fibrous Composites

Mechanics of Fibrous Composites

by M.H. Datoo


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Fibre-reinforced plastic (FRP) composite materials are basically of two types. The first type is short fibres reinforced in a plastic matrix, and the other type continuous (long) fibres reinforced in a plastic matrix. The exact distinction between a short and a continuous fibre is discussed in Chapter 1. Continuous fibre-reinforced composite materials are referred to by many labels: FRP composites, advanced composites, fibrous composites, composite materials or simply composites. These terms are now generally accepted to mean the same type of material, namely, continuous fibre reinforced in plastic. In this book, the term fibrous composites is used to define a continuous fibre reinforced in plastic. Fibrous composites are presently in use for a variety of structural applica­ tions, and may offer an alternative to conventional metallic materials. The behaviour of fibrous composites subjected to a loading condition is very different from that of a metallic isotropic material. Therefore, 'new' analytical and testing methods are required to analyse a structural element and sections made from layered fibrous composites. There are a number of books written on the subject of composite materials. All of these are excellent in their content and achieve the authors' objectives.

Product Details

ISBN-13: 9781851666003
Publisher: Springer Netherlands
Publication date: 11/30/1991
Edition description: 1991
Pages: 636
Product dimensions: 6.10(w) x 9.25(h) x 0.36(d)

Table of Contents

1 Introduction.- 1.1 Fibrous Composites.- 1.2 FRP Constituents.- 1.3 Reinforcement Types.- 1.4 Types of Materials.- 1.5 Terminology.- 2 Ply Stiffness Analysis.- 2.1 Isotropic Ply.- 2.2 Specially Orthotropic Ply.- 2.3 Generally Orthotropic Ply.- 2.4 Transformation of Elastic Constants.- 2.5 Typical Elastic Properties.- 3 Ply Strength Analysis.- 3.1 Isotropic Ply.- 3.2 Orthotropic Ply.- 3.3 Failure Criteria.- 3.4 Sign of Shear Stresses.- 3.5 Choice of Failure Criterion.- 3.6 Typical Strength Properties.- 4 Layered Laminate.- 4.1 Beam Constitutive Equation.- 4.2 Laminate Constitutive Equation.- 4.3 Laminate Notation.- 4.4 Equivalent Elastic Constants.- 5 Laminate Stiffness Analysis.- 5.1 Stiffness Formulation Procedure.- 5.2 Laminate Configuration Types.- 5.3 Symmetric SOPL: Isotropic Plies.- 5.4 Symmetric SOPL: Specially Orthotropic Plies.- 5.5 Symmetric SOPL: Generally Orthotropic Plies.- 5.6 Symmetric MOPL: Isotropic Plies.- 5.7 Symmetric MOPL: Generally Orthotropic Plies.- 5.8 Symmetric MOPL: Cross-ply.- 5.9 Symmetric MOPL: Angle-ply.- 5.10 Symmetric MOPL: Quasi-isotropic.- 5.11 Antisymmetric MOPL: Cross-ply.- 5.12 Antisymmetric MOPL: Angle-ply.- 5.13 Estimated Membrane Elastic Constants.- 5.14 Laminate Stiffness: Summary.- 6 Laminate Strength Analysis.- 6.1 First-Ply-Failure (FPF) Procedure.- 6.2 FPF: Symmetric Laminate—Membrane Load.- 6.3 FPF: Symmetric Laminate—Bending Load.- 6.4 FPF: Unsymmetric Laminate—Membrane Load.- 6.5 Last-Ply-Failure (LPF) Procedure.- 6.6 LPF: Complete Ply Failure—Membrane Load.- 6.7 LPF: Partial Ply Failure—Membrane Load.- 6.8 LPF: Complete Ply Failure—Bending Load.- 6.9 Estimated Laminate Strength.- 6.10 Laminate Strength: Summary.- 7 Residual Stresses.- 7.1 Compound Isotropic Beam.- 7.2 Laminate Thermal Stresses.- 7.3 Determining Thermal Residual Stresses.- 7.4 Constant Temperature Distribution.- 7.5 Hygroscopic Diffusion Mechanism.- 7.6 Laminate Hygroscopic Stresses.- 7.7 Constant and Linear Moisture Distribution.- 7.8 Influence on Laminate Strength.- 7.9 Typical Physical Properties.- 8 Thin-Walled Composite Sections.- 8.1 Assumptions and Axes Systems.- 8.2 Axial Force.- 8.3 Symmetrical Bending.- 8.4 Unsymmetrical Bending.- 8.5 Shear Forces.- 8.6 Torsion of Open Sections.- 8.7 Torsion of Closed Sections.- 9 Interlaminar Stresses.- 9.1 Free Edge Effects.- 9.2 Interlaminar Stress: fxz.- 9.3 Interlaminar Stresses: fyz and fz.- 9.4 Prediction Methods.- 9.5 Effect of Different Stacking Sequences.- 10 Miscellaneous Topics.- 10.1 Holes in Laminates.- 10.2 Buckling of Laminates.- 10.3 Computer Aided Laminate Analysis.- 10.4 FE Method: Line Elements.- 10.5 FE Method: Shell Elements.- 10.6 Test Methods.

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