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FORESTRY SCIENCES Volume 37

The titles published in this series are listed at the end of this volume.

Mechanical Properties of Bamboo

JULES J.A. JANSSEN Eindhoven University o/Technology Faculty 0/ Architecture and Building Eindhoven. The Netherlands

Springer Science+Business Media, B.V.

Library ofCongress Cataloging-in-Publication Data

Janssen, Ju1es J. A. Mechanica1 procerties of bamboo I by Ju1es J A. Janssen. p. cm. -- ,i=orestry sciences ; v. 37) Inc1udes indexes. ISBN 978-94-010-5426-3 ISBN 978-94-011-3236-7 (eBook) DOI 10.1007/978-94-011-3236-7

1. Bamboo--Mechanica1 properties. TA455.B3J36

620.1 '2--dc20

I. Ti! 1e.

II. Series.

1991

ISBN 978-94-010-5426-3

Printed on acid-free paper

All Rights Reserved © 1991 Springer Science+Business Media Dordrecht Originally published by Kluwer Academic Publishers in 1991 Softcover reprint ofthe hardcover 1st edition 1991 No part of the material protected by this copyright notice may be reproduced or utiIized in any form or by any means, electronic or mechanical, including photocopying, recording or by any information storage and retrieval system, without written permission from the copyright owner.

91-14533

Contents

Preface Chapter 1: Growth and anatomy Chapter 2: Thermal expansion Chapter 3: Moisture content and mass per volume Chapter 4: Chemistry Chapter 5: Elasticity Chapter 6: Bending Chapter 7: Compression Chapter 8: Shear Chapter 9: Tension Chapter 10: Torsion Chapter 11: Relations between properties List of symbols Author index Keyword index Keyword index (relations between properties)

v

vii 1 11

12

27

30 31 62 94 102 112

113 129 131 133 134

Preface

In this book I have collected many reports on the properties of bamboo. Since I started bamboo research in 1974, I have collected many publications on bamboo. However, in contacts with other researchers I became aware of the fact that several of these publications were unknown to them. Consequently their activities in research or in bamboo projects had to start at a lower level than if they had known some of these publications. Therefore, I discussed the need for a book like this with several colleagues, and I decided to start writing. In this book I present data on properties, as published by researchers. Certainly it is not complete; e.g. the proceedings of the bamboo workshop in Cochin in November 1988 are not included; they arrived just too late to be taken into account. On the other hand, in writing this preface I realize I have forgotten my own thesis. I do apologize to any colleague whose relevant report is not taken into account as well. I like to express my feelings of respect to the board of my faculty: they allowed me to spend so much time on this book, and they gave a considerable financial support for the printing costs. In my opinion bamboo should become a completely normal building material, just as timber, steel or concrete. I realize it is still a long way to go to reach this purpose. I hope this book is a small step on that way. I would appreciate if the reader is so kind