BS ISO 22889-2013 Metallic materials Method of test for the determination of resistance to stable crack extension using specimens of low constraint《金属材料 使用低限制样品测定抗稳定裂纹扩张的试验方法》.pdf
《BS ISO 22889-2013 Metallic materials Method of test for the determination of resistance to stable crack extension using specimens of low constraint《金属材料 使用低限制样品测定抗稳定裂纹扩张的试验方法》.pdf》由会员分享,可在线阅读,更多相关《BS ISO 22889-2013 Metallic materials Method of test for the determination of resistance to stable crack extension using specimens of low constraint《金属材料 使用低限制样品测定抗稳定裂纹扩张的试验方法》.pdf(60页珍藏版)》请在麦多课文档分享上搜索。
1、BSI Standards PublicationBS ISO 22889:2013Metallic materials Methodof test for the determinationof resistance to stable crackextension using specimens oflow constraintBS ISO 22889:2013 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 22889:2013. Itsupersedes BS
2、ISO 22889:2007 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee ISE/101/4, Toughness testing.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessarypr
3、ovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2013. Published by BSI StandardsLimited 2013ISBN 978 0 580 77193 4ICS 77.040.10Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was publish
4、ed under the authority of theStandards Policy and Strategy Committee on 30 September 2013.Amendments issued since publicationDate Text affectedBS ISO 22889:2013 ISO 2013Metallic materials Method of test for the determination of resistance to stable crack extension using specimens of low constraintMa
5、triaux mtalliques Mthode dessai pour la dtermination de la rsistance la propagation stable de fissures au moyen dprouvettes faible taux de triaxialit des contraintesINTERNATIONAL STANDARDISO22889Second edition2013-10-01Reference numberISO 22889:2013(E)BS ISO 22889:2013ISO 22889:2013(E)ii ISO 2013 Al
6、l rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2013All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without
7、 prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in Switzerla
8、ndBS ISO 22889:2013ISO 22889:2013(E) ISO 2013 All rights reserved iiiContents PageForeword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 24 Symbols 35 General requirements . 35.1 Introduction 35.2 Test specimens 45.3 Pre-test requirements . 65.4 Test apparatus . 65.5 T
9、est requirements 75.6 Post-test crack measurements 96 Determination of 5 a resistance curve and CTOA 116.1 General 116.2 Test procedure 116.3 R-curve plot . 116.4 Critical CTOA determination 127 Test report 137.1 General 137.2 Specimen, material and test environment . 137.3 Test data qualification .
10、 147.4 Qualification of the 5R-Curve .167.5 Qualification of c16Annex A (informative) Examples of test reports .27Annex B (informative) Apparatus for measurement of crack opening displacement, 5.32Annex C (informative) Determination of the crack tip opening angle, .34Annex D (informative) Determinat
11、ion of point values of fracture toughness 44Bibliography .47BS ISO 22889:2013ISO 22889:2013(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried
12、 out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO
13、 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different a
14、pproval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2. www.iso.org/directivesAttention is drawn to the possibility that some of the elements of this document may be the subj
15、ect of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received. www.iso.org/patentsAny trade name
16、used in this document is information given for the convenience of users and does not constitute an endorsement.The committee responsible for this document is ISO/TC 164, Mechanical testing of metals, Subcommittee SC 4, Toughness testing Fracture (F), Pendulum (P), Tear (T).This second edition cancel
17、s and replaces the first edition (ISO 22889:2007), of which it constitutes a minor revision.The following changes have been made: in 5.2.2.3, the notch width is now limited to W/30; in 5.2.2.4.3, revised the zone of application for the limited precracking force and corrected the logic of the subclau
18、se for the compact specimen; in 5.2.2.4.4, revised the zone of application for the limited precracking force and corrected the logic of the subclause for the middle crack tension specimen; in 5.5.5, replaced the stress intensification rate with the stress intensity factor rate; in 5.6.1.3 a), revise
19、d the ratio a0/W from between “0,45 to 0,65” to “from 0,4 to 0,7” for compact specimens; in 5.6.1.3 d), revised the allowed distance between the fatigue crack and the notch at the start of the test from 0,025W to 1,3 mm or 0,013W, whichever is the larger; in 5.6.2, added a provision: “However, measu
20、ring positions in the thickness direction shall be based on the contracted thickness at the final crack tip location.”; in 6.4, added Formula (12) to define the minimum amount of crack extension, amin; in 6.4, added the statement: “Formulae (11) and (12) apply to both the compact and middle crack te
21、nsile specimen geometries.”; corrected notes 2 and 3 on Figure 2; corrected notes 2 and 3 on Figure 3; designated a new notch width as W/30 on Figure 4; revised the report in 7.3.5 to be consistent with the above changes.iv ISO 2013 All rights reservedBS ISO 22889:2013ISO 22889:2013(E)IntroductionIS
22、O 12135 uses compact and bend specimens to determine specific (point) values of fracture toughness at the onset of either stable or unstable crack extension, and to quantify resistance to stable crack extension. These specimen types have near-square remaining ligaments to provide conditions of high
23、constraint. If certain size requirements are met, then the values of the quantities KIc, 0,2BLand J0,2BLdetermined from these specimens are considered size insensitive, and regarded as lower-bound fracture toughness values. Although not explicitly stated, size insensitivity holds also for the crack
24、extension resistance curve (R-curve).In engineering practice, however, there are cases which are not covered by the method of test in ISO 12135, for example where the component thickness is much less than that required for size-insensitive properties as determined using ISO 12135, the thickness of t
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