_STP_844-1984.pdf

METHODS FOR ASSESSING THE STRUCTURAL RELIABILITY OF BRITTLE MATERIALS A symposium sponsored by ASTM Committee E-24 on Fracture Testing San Francisco,Calif.,13 Dec.1982 ASTM SPECIAL TECHNICAL PUBLICATION 844 Stephen W.Freiman,National Bureau of Standards,and C,Michael Hudson,NASA Langley Research Center,editors ASTM Publication Code Number(PCN)04-844000-30#1916 Race Street,Philadelphia,Pa.19103 Copyright by ASTM Intl(all rights reserved);Wed Dec 23 18:11:39 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Librarj of Congress Cataloging in Publication Data 4elhllds for assessing the structural rcliahilitv of brittle materials.(AS IM special lechnical publication;844)-ASTM publication code number(PCN)04-844000-30.Includes bibliographies and index.I.Fracture mechanicsCongresses.2.Brittleness Congresses.3.Ceramic materialsCongresses.I.Frei-man.S.W.II.Hudson,C.M.III.ASIM Committee F-24 on Fracture Iesting.IV.Series.TA409.M4b l%4 620.1126 8,3-7,1253 ISBN 0-803l-02b5-8 Copyright(?)by AMEIICAN SOCII-MY POK TESIING AND MArEKLA.,s 1984 Library of Congress Catalog Card Number:83-73253 NOTE The Society is not responsible,as a body.for the statement.s and opinions advanced in this publication.;tl in B.iliinuirc.Md,(b)Ociober l)4 Copyright by ASTM Intl(all rights reserved);Wed Dec 23 18:11:39 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Foreword The symposium on Methods for Assessing the Structural Reliability of Brit-tle Materials was held on 13 Dec.1982 in San Francisco.Calif.The event was sponsored by ASTM Committee E-24 on Fracture Testing.Stephen W.Freiman.National Bureau of Standards,and C.Michael Hudson,NASA Langley Research Center,presided as chairmen of the symposium and also sered as editors of this publication.Copyright by ASTM Intl(all rights reserved);Wed Dec 23 18:11:39 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Related ASTM Publications Fractography of Ceramic and Metal Failures,STP 827(1984),04-827000-30 Fracture Mechanics for Ceramics,Rocks,and Concrete,STP 745(1981).04-745000-30 Fractography and Materials Science,STP 733(1981),04-733000-30 Fracture Mechanics Applied to Brittle Materials(11th Conference),STP 678(1979),04-678000-30 Copyright by ASTM Intl(all rights reserved);Wed Dec 23 18:11:39 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 pubHcation 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);Wed Dec 23 18:11:39 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);Wed Dec 23 18:11:39 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Contents Introduction 1 Failure from Contact-Induced Surface FlawsDAVID B.MARSHALL 3 Controlled Indentation Flaws for Construction of Toughness and Fatigue Master MapsROBERT F.COOK AND BRIAN R.LAWN 22 Fatigue Properties of Ceramics with Natural and Controlled Flaws:A Study on AluminaARMANDO C.GONZALEZ,HEIDI MULTHOPP,ROBERT F.COOK,BRIAN R.LAWN,AND STEPHEN W.FREIMAN 43 Statistical Analysis of Size and Stress State Effects on the Strength of an Alumina CeramicD.K.SHETTY,A.R.ROSENFIELD,AND W.H.DUCKWORTH 57 Dynamic and Static Fatigue of a Machinable Glass Ceramic MATTHEW B.MAGIDA,KATHERINE A.FORREST,AND THOMAS M.HESLIN 81 Effect of Multbgion Crack Growth on Proof Testing SHELDON M.WIEDERHORN,STEPHEN W.FREIMAN,EDWIN R.FULLER,JR.,AND HERBERT RICHTER 95 Discussion 116 Fracture Mechanics Analysis of Defect SizesGERALD G.TRANTINA 117 Effect of Temperature and Humidity on Delayed Failure of Optical Glass FibersJOHN E.RITTER,JR.,KARL JAKUS,AND ROBERT C.BABINSKI 131 Discussion 141 Subthreshold Indentation Flaws in the Study of Fatigue Properties of Ultrahigh-Strength GlassTIMOTHY P.DABBS,CAROLYN J.FAIRBANKS,AND BRIAN R.LAWN 142 Lifethne Prediction for Hot-Pressed Silicon Nitride at High TemperaturesTHEO FETT AND DIETRICH MUNZ 154 Copyright by ASTM Intl(all rights reserved);Wed Dec 23 18:11:39 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)purs