Engineering Design with Polymers

Abstract

Scope of neat and fibre reinforced polymers (FRP) for load bearing applications. State-of-the-art and trends. Design procedures for neat polymers under sustained, combined, and fatigue loading conditions. Stability and brittle fracture issues. Composition of FRP. Properties of fibre and matrix materials. Processing and design of FRP: laminate theory, stability, creep and fatigue behaviour.

Objective

Impart the basics to future mechanical, civil, and materials engineers for the engineering design with neat polymers and fibre reinforced polymers (FRP) for load bearing applications. In parallel to the presentation of the basics many practical applications will be treated in detail.

Content

1. Introduction 1.1 Retrospective view 1.2 State-of-the-art 1.3 Prospects for the future 1.4 References 2. Engineering design with neat polymers and with random-oriented fibre reinforced polymers 2.1 Scope of applications 2.2 Static loading 2.21 Tensile- and compressive loading 2.22 Flexural loading 2.23 Combined loading 2.24 Buckling 2.3 Fatigue 2.4 Brittle failure 2.5 Variable loading 2.6 Thermal stresses 2.7 To be subjected to aggressive chemicals 2.8 References 3. Composition and manufacturing techniques for fibre reinforced polymers 3.1 Introduction 3.2 Materials 3.21 Matrices 3.22 Fibres 3.3 Manufacturing techniques 3.31 Hand lay-up moulding 3.32 Directed fibre spray-up moulding 3.33 Low pressure compression moulding 3.34 High pressure compression moulding 3.35 Pultrusion 3.36 Centrifugal casting 3.37 Filament winding 3.38 Robots 3.39 Remarks about the design of moulds 3.4 References 4. Engineering design with high performance fibre reinforced polymers 4.1 Introduction 4.2 The unidirectional ply (or lamina) 4.21 Stiffness of the unidirectional ply 4.22 Thermal properties of the unidirectional ply 4.23 Failure criteria for the unidirectional ply 4.3 rules fort he design of components made out of high performance fibre reinforced polymers 4.4 Basics of the net theory 4.41 Assumptions and definitions 4.42 Estimation of the fibre forces in a plies 4.5 Basics of the classical laminate theory (CLT) 4.51 Assumptions and definitions 4.52 Elastic constants of multilayer laminate 4.53 Strains and curvatures in a multilayer laminate due to mechanical loading 4.54 Calculation of the stresses in the unidirectional plies due to mechanical loading 4.55 Strains and curvatures in a multilayer laminate due to mechanical and thermal loading 4.56 Calculation of the stresses in the unidirectional plies due to mechanical and thermal loading 4.57 Procedure of stress analysis 4.58 Taking account of the non-linear behaviour of the matrix 4.59 Admissible stresses, valuation of existing stresses 4.6 Puck’s action plane fracture criteria 4.7 Selected problems of buckling 4.8 Selected problems of fatigue 4.9 References

Resources