BS EN ISO 9513-2012 Metallic materials Calibration of extensometer systems used in uniaxial testing《金属材料 单轴向试验用引伸计系统的校准》.pdf

1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationMetallic materials Calibration of extensometer systems used in uniaxial testingBS EN ISO 9513:2012Copyright European Committee for Standardization Provided by IHS under license w

2、ith CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-National forewordThis British Standard is the UK implementation of EN ISO 9513:2012. It supersedes BS EN ISO 9513:2002 which is withdrawn.The UK participation in its preparation was entrusted by Technical Commi

3、tteeISE/101, Test methods for metals, to Subcommittee ISE/101/1, Uniaxial testing.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisions of acontract. Users are responsible for its cor

4、rect application. The British Standards Institution 2012Published by BSI Standards Limited 2012ISBN 978 0 580 74905 6ICS 17.040.30; 77.040.10Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of the StandardsPolicy

5、and Strategy Committee on 31 January 2013.Amendments issued since publicationAmd. No. Date Text affectedBRITISH STANDARDBS EN ISO 9513:2012Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from

6、 IHS-,-,-EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 9513 December 2012 ICS 77.040.10 Supersedes EN ISO 9513:2002English Version Metallic materials - Calibration of extensometer systems used in uniaxial testing (ISO 9513:2012) Matriaux mtalliques - talonnage des chanes extensomtriques u

7、tilises lors dessais uniaxiaux (ISO 9513:2012) Metallische Werkstoffe - Kalibrierung von Lngennderungs-Messeinrichtungen fr die Prfung mit einachsiger Beanspruchung (ISO 9513:2012) This European Standard was approved by CEN on 14 December 2012. CEN members are bound to comply with the CEN/CENELEC In

8、ternal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to a

9、ny CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official

10、versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norw

11、ay, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in a

12、ny form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 9513:2012: EBS EN ISO 9513:2012Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-EN ISO 9513:2

13、012 (E) 2 Contents Page Foreword 3BS EN ISO 9513:2012Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-EN ISO 9513:2012 (E) 3 Foreword This document (EN ISO 9513:2012) has been pre

14、pared by Technical Committee ISO/TC 164 “Mechanical testing of metals“ in collaboration with Technical Committee ECISS/TC 101 “Test methods for steel (other than chemical analysis)” the secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, ei

15、ther by publication of an identical text or by endorsement, at the latest by June 2013, and conflicting national standards shall be withdrawn at the latest by June 2013. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or C

16、ENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 9513:2002. According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Be

17、lgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Swit

18、zerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 9513:2012 has been approved by CEN as a EN ISO 9513:2012 without any modification. BS EN ISO 9513:2012Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or net

19、working permitted without license from IHS-,-,-ISO 9513:2012(E) ISO 2012 All rights reserved iiiContents PageIntroduction v1 Scope 12 Terms and definitions . 13 Symbols and designations . 14 Principle . 25 Calibration equipment 25.1 Calibration apparatus . 25.2 Calibration traceability . 26 Pre-cali

20、bration inspection . 26.1 Objective 26.2 Records of the inspection . 36.3 Identification of extensometer system elements 37 Measurement of extensometer gauge length 37.1 Fixed gauge length extensometry 37.2 Variable gauge length extensometry . 37.3 Non-contacting extensometry . 47.4 Extensometer gau

21、ge lengths established using setting gauges . 48 Calibration process . 48.1 Environmental considerations . 48.2 Position of the extensometer . 48.3 Calibration increments . 48.4 Calibration process . 68.5 Determination of the characteristics of the extensometer system 69 Classification of the extens

22、ometer system 79.1 Input data . 79.2 Analysis of the data 79.3 Classification criteria . 79.4 Assessment of the results 710 Uncertainty determination 810.1 Uncertainty of the calibration . 810.2 Uncertainty budget determination 811 Extensometer system calibration intervals 812 Calibration certificat

23、e . 812.1 Mandatory information . 812.2 Data presentation 9Annex A (informative) Uncertainty of measurement .10Annex B (informative) Calibration of the calibration apparatus 15Annex C (informative) Example of a report of the calibration of calibration apparatus 17Annex D (informative) Examples of ex

24、tensometer system configurations 20Annex E (informative) Laser extensometry .29Annex F (informative) Video extensometry .37Annex G (informative) Full field strain measurement video extensometry 41Annex H (informative) Calibration of a cross-head measurement system .43Bibliography .44BS EN ISO 9513:2

25、012Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ISO 9513:2012(E)IntroductionThis International Standard sets out criteria for the calibration of extensometer systems, covering

26、 general principles, the calibration equipment to be used, pre-calibration inspection and the measurement of gaugelength for various types of extensometer systems. Aspects of the calibration process are addressed, as are the assessment of the results, uncertainties, calibration intervals and reporti

27、ng. Criteria for calibration apparatus, their calibration and grading are addressed, complemented by a Bibliography covering a number of important papers related to extensometer systems and their application 1 to 10. Work is in progress to develop processes for dynamic extensometer calibration, howe

28、ver these have not reached, at the time of writing of this International Standard, the level of development appropriate for inclusion within this International Standard. For further information, refer to Reference 6.Informative annexes address calculation of uncertainties of measurement for an exten

29、someter system calibration (Annex A), calibration of calibration apparatus (Annex B) and an example of a calibration report (Annex C). Subsequent annexes address examples of extensometer system configurations (Annex D), laser extensometry (Annex E), video extensometry (Annex F), full field extensome

30、try (Annex G) and calibration of a crosshead measurement system (Annex H). ISO 2012 All rights reserved vBS EN ISO 9513:2012Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Metall

31、ic materials Calibration of extensometer systems used in uniaxial testing1 ScopeThis International Standard specifies a method for the static calibration of extensometer systems used in uniaxial testing, including axial and diametral extensometer systems, both contacting and non-contacting.2 Terms a

32、nd definitionsFor the purposes of this document, the following terms and definitions apply.2.1extensometer systemequipment used to measure displacement or strain on the surface of a test pieceNOTE For the purpose of this International Standard, the term “extensometer system” includes the indicator.

33、Some extensometers indicate strain directly (e.g. laser extensometers or digital image correlation techniques). Other extensometers indicate the change in gauge length of a test piece; this is converted into strain by dividing by the relevant gauge length.2.2gauge lengthportion of a test piece where

34、 extension is measured3 Symbols and designationsSymbols used throughout this International Standard are given in Table 1 together with their designation.Table 1 Symbols and designationsSymbol Designation UnitLeNominal gauge length of extensometer mmLeMeasured gauge length of extensometer mmlmaxMaxim

35、um limit of calibration range mmlminMinimum limit of calibration range mmliDisplacement indicated by extensometer mltDisplacement given by calibration apparatus mqLeRelative gauge length error of the extensometer system%qrbRelative bias error of the extensometer system %qbAbsolute bias error of the

36、extensometer system mr Resolution of the extensometer system mINTERNATIONAL STANDARD ISO 9513:2012(E) ISO 2012 All rights reserved 1BS EN ISO 9513:2012Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without

37、license from IHS-,-,-ISO 9513:2012(E)4 PrincipleThe calibration of extensometer systems involves a comparison of the readings given by the extensometer with known variations in length provided by a calibration apparatus.NOTE 1 The user can define the displacement range(s) over which the calibration

38、is to be performed. In this way, the performance of the extensometer system can be optimized. For example, for strain-controlled low cycle fatigue, only a small portion of the operating range of the extensometer is typically used. Hence, it would be appropriate, in this case, to concentrate the cali

39、bration on the centre portion of the operating range.The calibration process compares the known displacement from the calibration device with the output of the extensometer system. This output can range from manual readings of high precision dial gauges to the displacement indication of a transducer

40、/electronics/data-logging system. In the latter case, the extensometer system output would include any data curve fitting applied by the electronics/data-logging system.NOTE 2 For certain types of extensometer systems, the calibration and classification will also be dependent upon the ability of the

41、 extensometer system to define the gauge length.5 Calibration equipment5.1 Calibration apparatusThe calibration apparatus, which allows a known displacement ltto be applied to the extensometer, may consist of a rigid frame with suitable coaxial spindles or other fixtures to which the extensometer ca

42、n be attached. The calibration apparatus shall comprise a mechanism for moving at least one of the axial spindles together with a device for accurately measuring the change in length produced. These variations in length can be measured by, for example, an interferometer, a linear incremental encoder

43、 or gauge blocks and a comparator, or a micrometer.NOTE Special attachments to the calibration apparatus spindles are utilized for the calibration of diametral extensometers.The calibration apparatus should be calibrated in accordance with Annex B and should meet the performance requirements given i

44、n Table B.1.Annex B gives a recommended calibration procedure for the calibration apparatus and details performance criteria that indicate that the apparatus is suitable for calibrating extensometer systems in accordance with this International Standard.5.2 Calibration traceabilityThe calibration ap

45、paratus and the supporting equipment (such as micrometers, callipers, optical projection microscopes) shall be calibrated using standards that are traceable to the International System of Units (SI). The uncertainty associated with any measurements made by the supporting equipment shall not exceed o

46、ne third of the permissible error of the extensometer system being calibrated (see Table 2). The temperature measurement instrument shall have a resolution of 0,1 C.6 Pre-calibration inspection6.1 ObjectivePrior to the calibration of the extensometer system it shall be inspected. This shall comprise

47、 but not be limited to, inspection of the mechanical components for, for example, free movement, damaged parts, worn knife edges, and worn gauge length setting pins/fixtures. For extensometer systems incorporating electronic transducers, the cabling and connectors shall be examined for damage, wear

48、 etc.The extensometer system shall be calibrated in the as-found condition if at all possible. The results shall be assessed and, if necessary, the system shall be adjusted and re-calibrated. In this case, both data sets shall be reported.2 ISO 2012 All rights reservedBS EN ISO 9513:2012Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ISO 9513:2012(E)6.2 Records of the inspectionRecords of the pre-calibration inspection shall be kept, iden