_STP_948-1987.pdf

FRACTOGRAPHY OF MODERN ENGINEERING MATERIALS:COMPOSITES AND METALS A symposium sponsored by ASTM Committees E-24 on Fracture Testing and D-30 on High Modulus Fibers and Their Composites Nashville,TN,18-19 Nov.1985 ASTM SPECIAL TECHNICAL PUBLICATION 948 John E.Masters,American Cyanamid Co.,and Joseph J.Au,Sundstrand Corp.,editors ASTM Publication Code Number(PCN)04-948000-30#1916 Race Street,Philadelphia,PA 19103 Copyright by ASTM Intl(all rights reserved);Sun Dec 13 19:14:36 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Library of Congress Cataloging-in-Publication Data Fractography of modern engineering materials.(ASTM special technical publication;948)Papers presented at the Symposium on Fractography of Modem Engineering MaterialsForeword.ASTM publication code number(PCN)04-948000-30.Includes bibliographies and index.1.FractographyCongresses.2.Composite materials FractureCongresses.3.MetalsFractureCongresses.I.Masters,John E.II.Au,Joseph J.III.ASTM Committee E-24 on Fracture Testing.IV.ASTM Committee D-30 on High Modulus Fibers and Their Composites.V.Symposium on Fractography of Modern Engineering Materials(1985:Nashville,Tenn.)VI.Series.TA409.F683 1987 620.1126 87-14970 ISBN 0-8031-0950-4 Copyright by American Society for Testing and Materials 1987 Library of Congress Catalog Card Number:87-14970 NOTE The Society is not responsible,as a body,for the statements and opinions advanced in this publication.Printed in Baltimore,MD September 1987 Copyright by ASTM Intl(all rights reserved);Sun Dec 13 19:14:36 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Foreword This publication,Fractography of Modern Engineering Materials:Com-posites and Metals,contains papers presented at the Symposium on Fractog-raphy of Modern Engineering Materials,which was held in Nashville,Tennessee,18-19 Nov.1985.The symposium was sponsored by ASTM Committees E-24 on Fracture Testing and D-30 on High Modulus Fibers and Their Composites.John E.Masters,American Cyanamid Co.,and Joseph J.Au,Sundstrand Corp.,presided as symposium chairmen and were editors of this publication.Copyright by ASTM Intl(all rights reserved);Sun Dec 13 19:14:36 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Related ASTM Publications Composite Materials:Fatigue and Fracture,STP 907(1986),04-907000-33 Delamination and Debonding of Materials,STP 876(1985),04-876000-33 Short Fiber Reinforced Composite Materials,STP 772(1982),04-772000-30 Fracture Mechanics of Composites,STP 593(1976),04-593000-33 Copyright by ASTM Intl(all rights reserved);Sun Dec 13 19:14:36 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 apprecia-tion their dedication to high professional standards and their sacrifice of time and effort.ASTM Committee on Publications Copyright by ASTM Intl(all rights reserved);Sun Dec 13 19:14:36 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.ASTM Editorial Staff David D.Jones Janet R.Schroeder Kathleen A.Greene Bill Benzing Copyright by ASTM Intl(all rights reserved);Sun Dec 13 19:14:36 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Contents Overview Keynote Address Fracture Surface Micromorphology in Engineering Solids-R.W,HERTZBERG COMPOSITES Composites I:Delamination SEM Fractography of Pure and Mixed-Mode Interlaminar Fractures in Graphite/Epoxy CompositesL.ARCAN,M.ARCAN,AND I.M.DANIEL 41 Correlations Between Micromechanical Failure Processes and the Delamination Toughness of Graphite/Epoxy Systems M.F.HIBBS AND W.L.BRADLEY 68 Composites II:Structures Fracture Characteristics of Angleplied Laminates Fabricated from Overaged Graphite/Epoxy Prepregc.A.GINTY AND C.C,CHAMIS 101 A Fractographic Investigation of the Influence of Stacking Sequence on the Strength of Notched Laminated Composites C.E.HARRIS AND D.H.MORRIS 131 Discussion 153 Determination of Crack Propagation Directions in Graphite/Epoxy Struc-turesB.W.SMITH AND R.A.GROVE 154 Copyright by ASTM Intl(all rights reserved);Sun Dec 13 19:14:36 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Composites III:Particulate Composites Microstructural Aspects of Crack Propagation in Filled Polymers G