ISO TTA 5-2007 Code of practice for creep fatigue testing of cracked components《开裂构件的蠕变 疲劳试验用实施规程的规则》.pdf
《ISO TTA 5-2007 Code of practice for creep fatigue testing of cracked components《开裂构件的蠕变 疲劳试验用实施规程的规则》.pdf》由会员分享,可在线阅读,更多相关《ISO TTA 5-2007 Code of practice for creep fatigue testing of cracked components《开裂构件的蠕变 疲劳试验用实施规程的规则》.pdf(88页珍藏版)》请在麦多课文档分享上搜索。
1、 Reference number ISO/TTA 5:2007(E) ISO 2007TECHNOLOGY TRENDS ASSESSMENT ISO/TTA 5 Second edition 2007-10-15Code of practice for creep/fatigue testing of cracked components Code de bonne pratique pour les essais de fluage/fatigue des composants fissurs ISO/TTA 5:2007(E) PDF disclaimer This PDF file
2、may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the re
3、sponsibility of not infringing Adobes licensing policy. The ISO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-crea
4、tion parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. COPYRIGHT PROTECTED DOCUMENT ISO 20
5、07 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the cou
6、ntry of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2007 All rights reservedISO/TTA 5:2007(E) ISO 2007 All rights reserved iii Foreword ISO (the Internationa
7、l Organization for Standardization) is a worldwide federation of national standards 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 es
8、tablished 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 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardi
9、zation. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for vot
10、ing. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. To respond to the need for global collaboration on standardization questions at early stages of technological innovation, the ISO CounciI, following recommendations of the ISO/IEC Pr
11、esidents Advisory Board on Technological Trends, decided to establish a new series of ISO publications named Technology Trends Assessments (ISO/TTA). These publications are the results of either direct cooperation with prestandardization organizations or ad hoc Workshops of experts concemed with sta
12、ndardization needs and trends in emerging fields. Technology Trends Assessments are thus the result of prestandardization work or research. As a condition of publication by ISO, ISO/TTAs shall not conflict with existing International Standards or draft International Standards (DIS), but shall contai
13、n information that would normally form the basis of standardization. ISO has decided to publish such documents to promote the harmonization of the objectives of ongoing prestandardization work with those of new initiatives in the Research and Development environment. It is intended that these public
14、ations will contribute towards rationalization of technological choice prior to market entry. Whilst ISO/TTAs are not Standards, it is intended that they will be able to be used as a basis for standards development in the future by the various existing standards agencies. Attention is drawn to the p
15、ossibility 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. ISO/TTA 5 was prepared by VAMAS TWA25 and published under a memorandum of understanding concluded between ISO and VAMAS. This se
16、cond edition cancels and replaces the first edition (ISO/TTA 5:2006), which has been technically revised. ISO/TTA 5:2007(E) iv ISO 2007 All rights reservedContents Page 1 EXECUTIVE SUMMARY 1 2 SCOPE 1 3 SPECIFIC OBJECTIVES 2 4 INTRODUCTION. 2 4.1 Background to VAMAS Creep Crack Growth Initiatives .
17、3 4.2 Background to Industrial needs for validated Test Data 3 4.3 Relevance of Testing Methods to Life Assessment Codes 4 4.3.1 Background to Life Assessment Codes .4 4.3.2 Relation between laboratory tests and Component Assessment Codes . 5 4.3.3 Factors involved in the development of assessment c
18、odes 5 4.4 Requirements for the VAMAS TWA 25 CoP . 6 4.5 ISO requirements 6 4.5.1 ISO Technology Trend Assessment (ISO/TTA) 7 5 Acknowledgements 7 5.1 List of participants in VAMAS TWS25. 7 6 NOMENCLATURE AND ABBREVIATIONS 8 6.1 Nomenclatures 8 6.2 Listing of abbreviations 9 7 DESCRIPTION OF CREEP A
19、ND FATIGUE CRACKING 10 7.1 Failure due Creep Crack Growth (CCG)10 7.2 Creep Crack Initiation (CCI) . 10 7.3 Transient crack growth conditions . 10 7.4 Steady state Creep Cracking (CCG) 10 7.5 Fatigue and Creep/Fatigue Crack Growth (FCG and CFCG) 11 7.5.1 Failure due to fatigue 11 7.5.2 Creep/Fatigue
20、 interaction. 11 7.6 Factors affecting CCI, CCG and CFCG .11 7.6.1 Creep properties . 11 7.6.2 Metallurgical effects 12 7.6.3 Presence of residual stress fields. 12 7.6.4 Aggressive environments 12 7.6.5 Anisotropic and inhomogeneous material characteristics 12 8 TEST METHODS 13 8.1 Overview 13 8.2
21、Test Geometries 13 8.3 Experimental Test Methods . 14 8.3.1 Material procurement 14 8.3.2 Specimen selection. 14 8.3.3 Crack-plane orientation 14 8.3.4 Specimen machining . 14 8.3.5 Specific size requirements. 15 8.3.6 Specific side-grooving requirements 15 8.3.7 Shape of the crack front . 15 8.3.8
22、Pre-cracking to introduce a sharp flat crack front . 15 8.3.9 Pre-cracking for CCI tests 15 8.3.10 Crack length measurements 16 8.3.11 The use of Potential Drop (PD) 16 8.3.12 Preparing the specimens for PD leads . 16 8.3.13 Specimen setup. 16 ISO/TTA 5:2007(E) ISO 2007 All rights reserved v 8.3.14
23、Loading and creep displacement measurements 16 8.3.15 Displacement gauge17 8.3.16 Heating of the specimens .17 8.3.17 Initial pre-load 17 8.3.18 Monitoring the temperature 17 8.3.19 Unplanned temperature excursions 17 8.3.20 Initial pre-load 18 8.3.21 Specimen loading 18 8.4 Data Collection.18 8.4.1
24、 Detailed test and data monitoring18 8.4.2 Data logging .18 8.4.3 Displacement measurements.18 8.5 Post-Test Measurements 19 8.5.1 Measurement of the final crack front.19 8.5.2 Crack tip bowing19 8.5.3 Crack extension criteria 19 8.5.4 Crack deviation criteria .19 8.6 Recommended Minimum Number and
- 1.请仔细阅读文档,确保文档完整性,对于不预览、不比对内容而直接下载带来的问题本站不予受理。
- 2.下载的文档,不会出现我们的网址水印。
- 3、该文档所得收入(下载+内容+预览)归上传者、原创作者;如果您是本文档原作者,请点此认领!既往收益都归您。
下载文档到电脑,查找使用更方便
10000 积分 0人已下载
下载 | 加入VIP,交流精品资源 |
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- ISOTTA52007CODEOFPRACTICEFORCREEPFATIGUETESTINGOFCRACKEDCOMPONENTS 开裂 构件 疲劳 试验 实施 规程 规则 PDF

链接地址:http://www.mydoc123.com/p-1258224.html