_STP_1391-2000.pdf

STP 1391 Structural Integrity of Fasteners:Second Volume Pir M.Toor,editor ASTM Stock Number:STP 1391 ASTM 100 Barr Harbor Drive West Conshohocken,PA 19428-2959 Printed in the U.S.A.Library of Congress Cataloging-in-Publication Data Structural integrity of fasteners.Pir M.Toor,editor.p.cm.-(STP;1236)Papers presented at the symposium of the same name held in Miami,Florida on 18 Nov.1992.sponsored by ASTM Committee E-8 on Fatigue and Fracture diP foreword.ASTM publication code number(PCN)04-012360-30.Includes bibliographical references and index.ISBN 0-8031-2017-6 1.Fasteners.2.Structural stability.I.Toor,Pir M.I1.ASTM Committee E-8 on Fatigue and Fracture.II1.Series:ASTM special technical publication;1236.TJ1320.$77 1995 621.88c20 ISBN 0-8031-2863-0(v.2)95-12078 CIP Copyright?9 2000 AMERICAN SOCIETY FOR TESTING AND MATERIALS,West Conshohocken,PA.All rights reserved.This material may not be reproduced or copied,in whole or in part,in any printed,mechanical,electronic,film,or other distribution and storage media,without the written con-sent of the publisher.Photocopy Rights Authorization to photocopy items for internal,personal,or educational classroom use,or the internal,personal,or educational classroom use of specific clients,is granted by the American Society for Testing and Materials(ASTM)provided that the appropriate fee is paid to the Copy-right Clearance Center,222 Rosewood Drive,Danvers,MA 01923,Tel:508-750-8400;online:http:/www.copyrig Review Policy Each paper published in this volume was evaluated by two peer reviewers and at least one editor.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 the peer reviewers.In keeping with long standing publi-cation practices,ASTM maintains the anonymity of the peer reviewers.The ASTM Committee on Publications acknowledges with appreciation their dedication and contribution of time and effort on behalf of ASTM.Printed in Philadelphia,PA July 2000 Foreword This publication,Structural Integrity of Fasteners:Second Volume,contains papers pre-sented at the Second Symposium on Structural Integrity of Fasteners,held in Seattle,Wash-ington,on May 19,1999.The sponsor of this event was ASTM Committee E08 on Fatigue and Fracture and its Subcommittee E08.04 on Application.The Symposium Chairman was Pir M.Toor,Bettis Atomic Power Laboratory,(Bechtel Bettis,Inc.)West Mifflin,PA.Those who served as session chairmen were Harold S.Reemsnyder,Homer Research Labs,Beth-lehem Steel Corp.,Louis Raymond,L.Raymond and Associates,Newport Beach,California,and Jeffrey Bunch,Northrop Grumman Corporation,Pasadena,California.A Note of Appreciation to Reviewers The quality of papers that appear in this publication reflects not only the obvious effort of the authors but also the unheralded,though essential,work of the reviewers.This body of technical experts whose dedication,sacrifice of time and effort,and collective wisdom in reviewing the papers must be acknowledged.The quality level of this STP is a direct function of their respected opinions.On behalf of ASTM committee E08,I acknowledge with appre-ciation their dedication to a higher professional standard.Pir M.Toor Technical Program Chairman Contents Overview vii FAILURE APPROACHES Assessing Life Prediction Methodologies for Fasteners Under Bending Loads-W.COUNTS,W.S.JOHNSON,AND O.JIN 3 Materials and Specimens 5 Testing Techniques 5 Analysis 5 Results and Discussion 8 Summary and Conclusion 14 Laboratory Techniques for Service History Estimations of High Strength Fastener Failures-M.GAUDETT,T.TREGONING,E.FOCHT,D.AYLOR,AND X.Z.ZHANG 16 Intergranular Cracking of Failed Alley K-500 Fasteners 17 Results and Discussion 22 Summary 25 Failure Analysis of a Fractured Inconet 625 Stud 26 Conclusions 34 Assembly Cracks in a Hybrid Nylon and Steel Planter Wheel-c.WILSON AND S.CANFIELD 36 Initial Investigation 38 The Redesign 42 Discussion 47 Conclusions 47 Failure Analysis of High Strength Steel Army Tank Recoil Mechanism Bolts-V.K.CHAMPAGNE 48 Results 49 Discussion 60 Conclusions 61 Recommendations 62 FATIGUE AND FRACTURE The Effect of Fasteners on the Fatigue Life of Fiber Reinforced Composites-C.R.BROWN AND D.A.WILSON Experimental Program Results Conclusions Fatigue Testing of Low-Alloy Steel Fasteners Subjected to Simultaneous Bending and Axial LoadsmD.F.ALEXANDER,G.W.SKOCHKO,W.R.ANDREWS,AND R.S.BRIODY Fastener Materials Test Specimens Test Fixture Fatigue Tests Test Results Conclusions Appendix 1-Test Setup Calculations Stress Intensity Factor Solutions for Cracks in Threaded Fasteners-D.M.OSTER AND W.J.MILLS Nomenclature Numerical Analysis Methods Results Conclusions 65 65 67 70 72 73 74 75 76 77 81 82 85 85 86 89 100 ANALYSIS TECHNIQUES Residual Strength Assessment of Stress Corrosion in High Strength Ste