BS ISO 15850-2014 Plastics Determination of tension-tension fatigue crack propagation Linear elastic fracture mechanics (LEFM) approach《塑料 张力 张力疲劳裂纹扩展的测定 线弹性断裂力学 (LEFM) 方法》.pdf
《BS ISO 15850-2014 Plastics Determination of tension-tension fatigue crack propagation Linear elastic fracture mechanics (LEFM) approach《塑料 张力 张力疲劳裂纹扩展的测定 线弹性断裂力学 (LEFM) 方法》.pdf》由会员分享,可在线阅读,更多相关《BS ISO 15850-2014 Plastics Determination of tension-tension fatigue crack propagation Linear elastic fracture mechanics (LEFM) approach《塑料 张力 张力疲劳裂纹扩展的测定 线弹性断裂力学 (LEFM) 方法》.pdf(32页珍藏版)》请在麦多课文档分享上搜索。
1、BSI Standards PublicationBS ISO 15850:2014Plastics Determination oftension-tension fatigue crackpropagation Linear elasticfracture mechanics (LEFM)approachBS ISO 15850:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 15850:2014. Itsupersedes BS ISO 15850:20
2、02 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee PRI/21, Testing of plastics.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a
3、 contract. Users are responsible for its correctapplication. The British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 83299 4ICS 83.080.01Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the
4、authority of theStandards Policy and Strategy Committee on 28 February 2014.Amendments issued since publicationDate Text affectedBS ISO 15850:2014 ISO 2014Plastics Determination of tension-tension fatigue crack propagation Linear elastic fracture mechanics (LEFM) approachPlastiques Dtermination de l
5、a propagation de fissure par fatigue en traction Approche de la mcanique linaire lastique de la rupture (LEFM)INTERNATIONAL STANDARDISO15850Second edition2014-02-15Reference numberISO 15850:2014(E)BS ISO 15850:2014ISO 15850:2014(E)ii ISO 2014 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2014A
6、ll 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 prior written permission. Permission can be requested
7、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 SwitzerlandBS ISO 15850:2014ISO 15850:2014(E) ISO 2014 All right
8、s reserved iiiContents PageForeword iv1 Scope . 12 Normative references 13 Terms and definitions . 14 Principle 55 Significance and use 56 Test specimens 66.1 Shape and size . 66.2 Preparation 96.3 Notching 96.4 Side grooves 106.5 Conditioning . 107 Apparatus 107.1 Test machine 107.2 Grips 117.3 Cra
9、ck length measurement . 117.4 Test atmosphere . 158 Test procedure .158.1 Measurement of specimen dimensions 158.2 Specimen mounting . 158.3 Loading . 158.4 Out-of-plane crack propagation 158.5 Discontinuous crack propagation 158.6 Number of tests . 159 Calculation and interpretation of results 169.
10、1 Crack length versus number of cycles 169.2 Crack curvature correction 169.3 Crack growth rate da/dN .169.4 Stress intensity factor range K .169.5 Energy release rate range G . 1710 Test report 1710.1 General 1710.2 For fatigue crack propagation test 1710.3 For fatigue crack propagation to failure
11、test 18Annex A (informative) Abnormality in the use of cyclic fatigue crack propagation test for ranking long-term static fatigue behaviour .19Bibliography .23BS ISO 15850:2014ISO 15850:2014(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national stan
12、dards bodies (ISO member bodies). The work of preparing International Standards is normally carried 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 org
13、anizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO 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
14、 further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval 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 (see www.iso.org/dir
15、ectives).Attention is drawn to the possibility that some of the elements of this document may be the subject 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 th
16、e Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions relate
17、d to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information.The committee responsible for this document is ISO/TC 61, Plastics, Subcommittee SC 2, Mechanical propert
18、ies.This second edition cancels and replaces the first edition (ISO 15850:2002) of which it constitutes a minor revision.iv ISO 2014 All rights reservedBS ISO 15850:2014INTERNATIONAL STANDARD ISO 15850:2014(E)Plastics Determination of tension-tension fatigue crack propagation Linear elastic fracture
19、 mechanics (LEFM) approach1 ScopeThis International Standard specifies a method for measuring the propagation of a crack in a notched specimen subjected to a cyclic tensile load varying between a constant positive minimum and a constant positive maximum value. The test results include the crack leng
20、th as a function of the number of load cycles and the crack length increase rate as a function of the stress intensity factor and energy release rate at the crack tip. The possible occurrence of discontinuities in crack propagation is detected and reported.The test can be also used for the purpose o
21、f determining the resistance to crack propagation failure. In this case, the results can be presented in the form of number of cycles to failure or total time taken to cause crack propagation failure versus the stress intensity factor (see Annex A).The method is suitable for use with the following r
22、ange of materials: rigid and semi-rigid thermoplastic moulding and extrusion materials (including filled and short-fibre-reinforced compounds) plus rigid and semi-rigid thermoplastic sheets; rigid and semi-rigid thermosetting materials (including filled and short-fibre-reinforced compounds) plus rig
23、id and semi-rigid thermosetting sheets.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the re
24、ferenced document (including any amendments) applies.ISO 291, Plastics Standard atmospheres for conditioning and testingISO 527 (all parts), Plastics Determination of tensile propertiesISO 2818, Plastics Preparation of test specimens by machining3 Terms and definitionsFor the purposes of this docume
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