_STP_617-1977.pdf

TTESTING AND DESIGN(FOURTH CONFERENCE)A conference sponsored by the AMERICAN SOCIETY FOR TESTING AND MATERIALS Valley Forge,Pa,3-4 May 1976 ASTM SPECIAL TECHNICAL PUBLICATION 617 J.G.Davis,Jr.,conference chairman List price$51.75 04-617000-33#AMERICAN SOCIETY FOR TESTING AND MATERIALS 1916 Race Street,Philadelphia,Pa.19103 Copyright by ASTM Intl(all rights reserved);Sun Jan 3 20:09:22 EST 2016Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.by AMERICAN SOCIETY FOR TESTING AND MATERIALS 1977 Library of Congress Catalog Card Number:76-40796 NOTE The Society is not responsible,as a body,for the statements and opinions advanced in this publication.Primed in Baltimore,Md.March 1977 Copyright by ASTM Intl(all rights reserved);Sun Jan 3 20:09:22 EST 2016Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Foreword The Fourth Conference on Composite Materials:Testing and Design was held 3-4 May 1976 at Valley Forge,Pa.The American Society for Testing and Materials Committee D-30 on High Modulus Fibers and Their Composites sponsored the conference.J.G.Davis,Jr.,National Aeronautics and Space Administration-Langley Research Center,served as conference chairman.Most of the papers presented at the eight sessions are included in this volume which complements the first,second,and third conference publicationslSrM STP 460,ASTM STP 497,and ASTM STP 546,Composite Materials:Testing and Design.Copyright by ASTM Intl(all rights reserved);Sun Jan 3 20:09:22 EST 2016Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Related ASTM Publications Composite Reliability,STP 580(1975),$49.75(04-580000-33)Fracture Mechanics of Composites,STP 593(1976),$23.50(04-593000-33)Environmental Effects on Advanced Composite Materials,STP 602(1976),$10.00(04-602000-33)Copyright by ASTM Intl(all rights reserved);Sun Jan 3 20:09:22 EST 2016Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.A Note of Appreciation to Reviewers This publication is made possible by the authors and,also,the un-heralded efforts of the reviewers.This body of technical experts whose dedication,sacrifice of time and effort,and collective wisdom in review-ing the papers must be acknowledged.The quality level of ASTM publica-tions in a direct function of their respected opinions.On behalf of ASTM we acknowledge their contribution with appreciation.ASTM Committee on Publications Copyright by ASTM Intl(all rights reserved);Sun Jan 3 20:09:22 EST 2016Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Editorial Staff Jane B.Wheeler,Managing Editor Helen M.Hoersch,Associate Editor Ellen J.McGlinchey,Assistant Editor Kathleen P.Turner,Assistant Editor Sheila G.Pulver,Assistant Editor Copyright by ASTM Intl(all rights reserved);Sun Jan 3 20:09:22 EST 2016Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Contents Introduction FRACTURE AND FATIGUE Fracture Resistance Characterization of Graphite/Epoxy Composites D.H.MORRIS AND H.T.HAHN 5 Experimental Program 6 Results 7 Conclusions 15 An Experimental Study of tlie Fracture Behavior of Laminated Graphite/Epoxy CompositesH.F.BRINSON AND Y.T.YEOW 18 Materials and Test Procedures 22 Experimental Results 22 Discussion 34 Effect of Time at Load on Fatigue Response of(0/45/90)J T300/5208 Graphite-Epoxy LaminateG.P.SENDECKYJ AND H.D.STALNAKER 39 Experimental Results 40 Analysis of Test Results 46 Conclusions 51 Preliminary Development of a Fundamental Analysis Model for Crack Growth in a Fiber Reinforced Composite Material M.F.KANNINEN,E.F.RYBICKI,AND W.I.GRIFFITH 53 Analysis Procedure 54 Example Computational Results and Discussion 62 Fatigue of Notched Fiber Composite Laminates:Analytical and Experimental EvaluationS.V.KULKARNI,P.V.MCLAUGHLIN,JR.,R.B.PIPES,AND B.W.ROSEN 70 Static Failure Model 72 Fatigue Analysis 75 Experimental Program 78 Analysis/Experiment Correlation Study 84 Concluding Remarks 91 Copyright by ASTM Intl(all rights reserved);Sun Jan 3 20:09:22 EST 2016Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Delamination in Quasi-Isotropic Graphite-Epoxy Laminates K.L.REIFSNIDER,E.G.HENNEKE II,AND W.W.STINCHCOMB 93 Experimental Program 94 Results 96 Discussion and Conclusions 103 Structural Design Significance of Tension-Tension Fatigue Data on CompositesG.C.GRIMES 106 Graphite/Epoxy Fatigue 107 Hybrid Composites 113 Structural Design Significance 116 Conclusions 119 MATERIALS AND PROCESSING Evaluation of Selected High-Temperature Thermop