Advanced fibre-reinforced polymer (FRP) composites for structural applications © Woodhead Publishing Limited, 2013 Related titles: Eco-efficient concrete (ISBN 978-0-85709-424-7) Handbook of seismic risk analysis and management of civil infrastructure systems (ISBN 978-0-85709-268-7) Developments in fiber-reinforced polymer (FRP) composites for civil engineering (ISBN 978-0-85709-234-2) Details of these books and a complete list of titles from Woodhead Publishing can be obtained by: ∑ visiting our web site at www.woodheadpublishing.com ∑ contacting Customer Services (e-mail: [email protected]; fax: +44 (0) 1223 832819; tel.: +44 (0) 1223 499140 ext. 130; address: Woodhead Publishing Limited, 80, High Street, Sawston, Cambridge CB22 3HJ, UK) ∑ in North America, contacting our US office (e-mail: usmarketing@ woodheadpublishing.com; tel.: (215) 928 9112; address: Woodhead Publishing, 1518 Walnut Street, Suite 1100, Philadelphia, PA 19102-3406, USA) If you would like e-versions of our content, please visit our online platform: www.woodheadpublishingonline.com. 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The team responsible for publishing this book: Commissioning Editor: Jess Rowley Publications Coordinator: Emily Cole Project Editor: Anneka Hess Editorial and Production Manager: Mary Campbell Production Editor: Adam Hooper Cover Designer: Terry Callanan © Woodhead Publishing Limited, 2013 Woodhead Publishing Series in Civil and Structural Engineering: Number 46 Advanced fibre- reinforced polymer (FRP) composites for structural applications Edited by Jiping Bai Oxford Cambridge Philadelphia New Delhi © Woodhead Publishing Limited, 2013 Published by Woodhead Publishing Limited, 80 High Street, Sawston, Cambridge CB22 3HJ, UK www.woodheadpublishing.com www.woodheadpublishingonline.com Woodhead Publishing, 1518 Walnut Street, Suite 1100, Philadelphia, PA 19102-3406, USA Woodhead Publishing India Private Limited, 303, Vardaan House, 7/28 Ansari Road, Daryaganj, New Delhi – 110002, India www.woodheadpublishingindia.com First published 2013, Woodhead Publishing Limited © Woodhead Publishing Limited, 2013. 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Neither this book nor any part may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, microfilming and recording, or by any information storage or retrieval system, without permission in writing from Woodhead Publishing Limited. The consent of Woodhead Publishing Limited does not extend to copying for general distribution, for promotion, for creating new works, or for resale. Specific permission must be obtained in writing from Woodhead Publishing Limited for such copying. Trademark notice: Product or corporate names may be trademarks or registered trademarks, and are used only for identification and explanation, without intent to infringe. British Library Cataloguing in Publication Data A catalogue record for this book is available from the British Library. Library of Congress Control Number: 2013943194 ISBN 978-0-85709-418-6 (print) ISBN 978-0-85709-864-1 (online) ISSN 2052-4714 Woodhead Publishing Series in Civil and Structural Engineering (print) ISSN 2052-4722 Woodhead Publishing Series in Civil and Structural Engineering (online) The publisher’s policy is to use permanent paper from mills that operate a sustainable forestry policy, and which has been manufactured from pulp which is processed using acid- free and elemental chlorine-free practices. Furthermore, the publisher ensures that the text paper and cover board used have met acceptable environmental accreditation standards. Typeset by Replika Press Pvt Ltd, India Printed by Lightning Source © Woodhead Publishing Limited, 2013 Contents Contributor contact details xv Woodhead Publishing Series in Civil and Structural Engineering xix 1 Introduction 1 J. Bai, University of South Wales, UK 1.1 References 3 Part I Materials 5 2 Phenolic resins as a matrix material in advanced fiber-reinforced polymer (FRP) composites 7 E. Frollini, C. G. Silva and E. C. ramireS, University of São Paulo, Brazil 2.1 Introduction to phenolic resins 7 2.2 Synthesis of phenolic-type matrices 9 2.3 Phenols, aldehydes and other reagents 13 2.4 Bio-based resins 14 2.5 Composites from phenolic-type matrices 19 2.6 Reinforcements 21 2.7 Interfaces and voids 26 2.8 Mechanical properties 29 2.9 Thermal properties 31 2.10 Other properties: electrical conductivity, fire safety and recycling 35 2.11 Conclusion and future trends 36 2.12 Acknowledgements 36 2.13 References 37 © Woodhead Publishing Limited, 2013 vi Contents 3 Polyester resins as a matrix material in advanced fibre-reinforced polymer (FRP) composites 44 N. miSkolczi, University of Pannonia, Hungary 3.1 Introduction 44 3.2 Fibre-reinforced polymer (FRP) composites 45 3.3 Polyesters as matrix materials 47 3.4 Manufacture of polyester-based composites 51 3.5 Reinforcements for polyester-based composites 55 3.6 Applications of polymer-based composites 59 3.7 Conclusion and future trends 63 3.8 Acknowledgements 64 3.9 References 65 4 Vinylester resins as a matrix material in advanced fibre-reinforced polymer (FRP) composites 69 F. SaraSini and C. Santulli, University of Rome ‘La Sapienza,’ Italy 4.1 Introduction 69 4.2 Vinylester and other resins as matrix materials 71 4.3 Fibre-reinforced polymer (FRP) composites as structural materials 72 4.4 Fatigue, creep and other properties of structural composites 73 4.5 Chemistry and properties of vinylester resins as matrix materials 78 4.6 Applications of vinylester-based composites in civil engineering 81 4.7 Conclusion and future trends 84 4.8 Sources of further information and advice 85 4.9 References 86 5 Epoxy resins as a matrix material in advanced fiber- reinforced polymer (FRP) composites 88 V. Fiore and A. valenza, University of Palermo, Italy 5.1 Introduction 88 5.2 Curing reactions of epoxy resins 90 5.3 Common epoxy resins 92 5.4 Curing agents 96 5.5 Bio-derived epoxy resins 97 5.6 Mechanical properties 100 5.7 Chemical properties 101 5.8 Thermal and electrical properties 103 © Woodhead Publishing Limited, 2013 Contents vii 5.9 Optical properties 105 5.10 Applications 106 5.11 Toxicity, hazard and safe handling 114 5.12 Future trends 116 5.13 Conclusion 116 5.14 References 117 Part II Processing and fabrication 123 6 Prepreg processing of advanced fibre-reinforced polymer (FRP) composites 125 S. PanSart, Germanischer Lloyd Industrial Services GmbH, Germany 6.1 Introduction 125 6.2 Prepreg semi-finished products 127 6.3 Manufacturing processes 131 6.4 Quality issues 149 6.5 Conclusion and future trends 152 6.6 References 153 7 Resin infusion/liquid composite moulding (LCM) of advanced fibre-reinforced polymer (FRP) 155 S. Bickerton, Q. GoviGnon and P. kelly, The University of Auckland, New Zealand 7.1 Introduction 155 7.2 Process description 156 7.3 Simulation and experimental observations 161 7.4 Rigid moulds 165 7.5 Flexible moulds 169 7.6 Current usage 172 7.7 Case studies 173 7.8 Future trends 174 7.9 Conclusion 174 7.10 Sources of further information and advice 175 7.11 References 175 8 Filament winding processes in the manufacture of advanced fibre-reinforced polymer (FRP) composites 187 A. khennane, University of New South Wales at the Australian Defence Force Academy, Australia 8.1 Introduction 187 8.2 Filament winding 188 © Woodhead Publishing Limited, 2013 viii Contents 8.3 Filament-wound structures for infrastructure applications 191 8.4 New beam design using filament winding 194 8.5 Conclusion 204 8.6 References 204 9 Pultrusion of advanced fibre-reinforced polymer (FRP) composites 207 J. ramôa correia, Technical University of Lisbon, Portugal 9.1 Introduction 207 9.2 Overview of the pultrusion process 209 9.3 Fibre reinforcements and matrices used in the pultrusion of advanced composites 210 9.4 Pultrusion line equipment and manufacturing processes 216 9.5 Technical specifications 220 9.6 Quality control 221 9.7 Joining technologies 223 9.8 Types of pultruded advanced composites 225 9.9 Properties of pultruded advanced composites 230 9.10 Applications of pultruded advanced composites 235 9.11 Sustainability of pultruded advanced composites 241 9.12 Conclusion and future trends 243 9.13 Sources of further information and advice 245 9.14 References 247 Part III Properties, performance and testing 253 10 Understanding and predicting interfacial stresses in advanced fibre-reinforced polymer (FRP) composites for structural applications 255 A. Al-ShawaF, Monash University, Australia 10.1 Introduction 255 10.2 Interfacial stresses in fibre-reinforced polymer (FRP) composites 256 10.3 Mechanical properties of matrices and fibre reinforcements 258 10.4 Structural concrete and steel adherends in civil infrastructure 259 10.5 Measuring stresses in FRP composite bonded joints 266 10.6 Theoretical methods for predicting stress in FRP composite bonded joints 271 10.7 Finite element method (FEM) and finite difference method (FDM) models of stress in FRP composite joints 281 © Woodhead Publishing Limited, 2013 Contents ix 10.8 Implications for the design of FRP composite joints 287 10.9 Conclusion and future trends 289 10.10 Sources of further information and advice 290 10.11 References 290 11 Understanding and predicting stiffness in advanced fibre-reinforced polymer (FRP) composites for structural applications 298 R. M. GuedeS, University of Porto, Portugal and J. Xavier, CITAB/UTAD, Portugal 11.1 Introduction 298 11.2 General aspects of composite stiffness 299 11.3 Understanding lamina stiffness 301 11.4 Micromechanical analysis of a lamina 310 11.5 Comparing micromechanical models with experimental data 322 11.6 Stiffness and compliance transformations 325 11.7 Laminate plate and shell stiffness: classical lamination theory (CLT) 330 11.8 Properties of different types of laminate 340 11.9 In-plane and flexural engineering constants of a laminate 342 11.10 New optical methods for measuring laminate stiffness 348 11.11 Conclusion 355 11.12 Software available 357 11.13 References 357 12 Understanding the durability of advanced fibre- reinforced polymer (FRP) composites for structural applications 361 K. Benzarti, Université Paris-Est/IFSTTAR, France and X. colin, Arts et Métiers ParisTech, France 12.1 Introduction 361 12.2 Structure and processing of fibre-reinforced polymer (FRP) composites 363 12.3 Applications of FRP composites in civil engineering 366 12.4 Physical ageing: mechanisms and stabilization techniques 371 12.5 Mechanisms of chemical ageing: introduction 379 12.6 Mechanisms of chemical ageing: reaction–diffusion coupling 393 12.7 Mechanisms of chemical ageing: hydrolytic processes 399 12.8 Mechanisms of chemical ageing: oxidation processes 402 12.9 Chemical ageing: stabilization techniques 411 © Woodhead Publishing Limited, 2013