_STP_1060-1990.pdf

STP 1060 Surface-Crack Growth:Models,Experiments,and Structures Walter G.Reuter,John H.Underwood,and James C.Newman,Jr.,editors ASTM 1916 Race Street Philadelphia,PA 19103 Copyright by ASTM Intl(all rights reserved);Wed Dec 23 18:45:11 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Library of Congress Cataloging-in-Publication Data Surface-crack growth:models,experiments,and structures/Walter G.Reuter,John H.Underwood,and James C.Newman,Jr.,editors.(STP:1060 The symposium on Surface-Crack Growth:Models,Experiments,and Structures was held in Sparks,Nevada,25 April 1988-Foreword.Includes bibliographies and index.ISBN 0-8031-1284-X 1.Surfaces(Technology)-Congresses.2.Fracture mechanics-Congresses.3.Materials-Cracking-Congresses.I.Reuter,Walter G.,1938-II.Underwood,John H.,1941-.III.Newman,James,C.,Jr.,1942-IV.Symposium on Surface-Crack Growth:Experiments,and Structures(1988:Sparks,Nev.)TA418.7.$84 1990 620.126-dc20 89-49360 CIP Copyright?9 by AMERICAN SOCIETY FOR TESTING AND MATERIALS 1990 NOTE The Society is not responsible as a body,for the statements and opinions advanced in this publication.Peer Review Policy Each paper published in this volume was evaluated by three peer reviewers.The authors addressed all of the reviewers comments to the satisfaction of both the technical editor(s)and the ASTM Committee on Publications.The quality of the papers in this publication reflects not only the obvious efforts of the authors and the technical editor(s),but also the work of these peer reviewers.The ASTM Committee on Publications acknowledges with appreciation their dedication and contri-bution of time and effort on behalf of ASTM.Printed in Baltimore,MD April 1990 Copyright by ASTM Intl(all rights reserved);Wed Dec 23 18:45:11 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.J.L.Swedlow 1935-1989 Dedication Dr.Swedlow was one of a rather small but very active group in the early history of Committee E24 on Fracture Testing.Professor Swedlow served in a variety of roles includ-ing researcher,organizer,initiator,and expeditor within Committee E24 and within related applied mechanics and fracture mechanics activities.Professor Swedlows services to Committee E24 include membership on Fracture Mechanics Test Methods Subcom-mittee(1965-1973);Representative to International Con-gress on Fracture(1969-);National Symposium Task Group(1972-1989),Chairman(1977-1989);Executive Committee(1973-).Jerry was the chairman of the orga-nizing committee for the first National Symposium on Frac-ture Mechanics to be held away from Lehigh University(1970).In subsequent years,Jerry served on the organizing committees of three additional National Symposia and cochairman of the ninth symposium.For many years until his death,Jerry was responsible to Committee E24 for the organizational oversight of all National Symposia.He played a crucial role,along with a few others,in-assuring the very high quality and vigor that we have come to associate with these Symposia.In a related activity,Professor Swedlow for the past 20 years served as editor of the Reports of Current Research for the International Journal of Fracture.Copyright by ASTM Intl(all rights reserved);Wed Dec 23 18:45:11 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Professor Swedlow was also a member of Committee D30 on High Modulus Fibers and Their Composites from 1972 to 1975.During that time,Jerry participated in some of the ear-liest work on the establishment of test methods and analysis models for the fracture mechanics behavior of graphite/epoxy composites.That initial work is still cited by those active in the research area.Professor Swedlows involvement in Committee E24 research activities was primarily focused on the nature of elastoplastic responses of materials with cracks.One of Jer-rys principal research concerns in this work was to match numerical responses to experimental data.He established the importance of a proper understanding of uniaxial stress-strain curve development in being able to establish meaning-ful correlation.Additionally,he was an early contributor regarding the development of ductile fracture criteria and the influence of crack front curvature on plane strain fracture toughness measurements.One of his earliest and abiding research interests related to these issues was that of the three-dimensional character of elastic and elasto-plastic response of cracked bodies.As part of this activity Jerry was involved in studies of the behavior of surface cracks.Some of his con-tributions in this field are identified in the first paper in this publication.He made numerous presentations within the task group Structure of Committee E24,as well as the National Symposia.Committee E