_STP_836-1984.pdf

EFFECTS OF DEFECTS IN COMPOSITE MATERIALS A symposium sponsored by ASTM Committees D-30 on High Modulus Fibers and Their Composites and E-9 on Fatigue San Francisco,Calif.,13-14 Dec.1982 ASTM SPECIAL TECHNICAL PUBLICATION 836 Dick J.Wilkins,General Dynamics,symposium chairman ASTM Publication Code Number(PCN)04-836000-33#1916 Race Street,Philadelphia,.Pa.19103 Copyright by ASTM Intl(all rights reserved);Thu Dec 31 18:34:34 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Library of Congress Cataloging in Publication Data Effects of defects in composite materials.(ASTM special technical publication;836)Includes bibliographies and index.ASTM publication code number(PCN)04-836000-33.1.Composite materialsDefectsCongresses.1.Symposium on Effects of Defects in Composite Materials(1982:San Francisco,Calif.)II.ASTM Committee D-30 on High Modulus Fibers and Their Composites.III.American Society for Testing and Materials.Committee E-9 on Fatigue.IV,Series.TA418.9.C6E37 1984 620.n8 83-73441 ISBN 0-8031-0218-6 Copyright by AMERICAN SOCIETY FOR TESTING AND MATERIALS 1984 Library of Congress Catalog Card Number:83-73441 NOTE The Society is not responsible,as a body,for the statements and opinions advanced in this publication.Printed in Ann Arbor,Mich.September 1984 Copyright by ASTM Intl(all rights reserved);Thu Dec 31 18:34:34 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Foreword The symposium on Effects of Defects in Composite Materials was held in San Francisco,California,13-14 December 1982.ASTM Committees D-30 on High Modulus Fibers and Their Composites and E-9 on Fatigue sponsored the symposium.Dick J.Wilkins,General Dynamics,presided as symposium chair-man.Copyright by ASTM Intl(all rights reserved);Thu Dec 31 18:34:34 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Related ASTM Publications Long-Term Behavior of Composites,STP 813(1983),04-813000-33 Composite Materials:Quality Assurance and Processing,STP 797(1983),04-797000-30 Composite Materials:Testing and Design(6th Conference),STP 787(1982),04-787000-33 Damage in Composite Materials,STP 775(1982),04-775000-30 Copyright by ASTM Intl(all rights reserved);Thu Dec 31 18:34:34 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.A Note of Appreciation to Reviewers The quality of the papers that appear in this publication reflects not only the obvious efforts of the authors but also the unheralded,though essential,work of the reviewers.On behalf of ASTM we acknowledge with appreciation their dedication to high professional standards and their sacrifice of time and effort.ASTM Committee on Publications Copyright by ASTM Intl(all rights reserved);Thu Dec 31 18:34:34 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.ASTM Editorial Staff Janet R.Schroeder Kathleen A.Greene Rosemary Horstman Helen M.Hoersch Helen P.Mahy Allan S.Kleinberg Susan L.Gebremedhin Copyright by ASTM Intl(all rights reserved);Thu Dec 31 18:34:34 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Contents Introduction 1 Fracture Toughness and Impact Characteristics of a Hybrid System:Glass-Fiber/Sand/Polyesters.K.JONEJA AND G.M.NEWAZ 3 Characterization and Analysis of Damage Mechanisms in Tension-Tension Fatigue of Graphite/Epoxy LaminatesR.D.JAMISON.K.SCHULTE,K.L.REIFSNIDER,AND W.W.STINCHCOMB 21 Stress Distributions in Damaged Compositess.B.BATDORF AND R.GHAFFARIAN 56 Influence of Prescribed Delaminations on Stiffness-Controlled Behavior of Composite LaminatesA.D.REDDY,L.w.REHFIELD,AND R.S.HAAG 71 Characterizing the Effect of Delamination Defect by Mode I Delamination TestF.X.DE CHARENTENAY,J.M.HARRY,Y.J.PREL,AND M.L.BENZEGGAGH 84 Materials Characterization for Matrix-Dominated Failure ModesJ.M.WHITNEY AND C.E.BROWNING 104 Mixed-Mode Strain-Energy-Release Rate Effects on Edge Delamination of CompositesT.K.OBRIEN 125 A Mixed-Mode Fracture Analysis of(25/90)s Graphite/Epoxy Composite LaminatesG.E.LAW 143 Criticality of Disbonds in Laminated Composites S.N.CHATTERJEE,R.B.PIPES,AND R.A.BLAKE,JR.161 Strain-Energy Release Rate Analysis of Cyclic Delamination Growth in Compressively Loaded Laminatesj.D.WHITCOMB 175 Copyright by ASTM Intl(all rights reserved);Thu Dec 31 18:34:34 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Effect of Fatigue-Induced Defects on the Residual Response of Composite LaminatesA.L.HIGHSMITH,W.W.STINCHCOMB,AND K.L.RE