1、BSI Standards PublicationBS ISO 16130:2015Aerospace series Dynamictesting of the lockingbehaviour of boltedconnections under transverseloading conditions (vibrationtest)BS ISO 16130:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 16130:2015.The UK particip
2、ation in its preparation was entrusted to TechnicalCommittee ACE/12, Aerospace fasteners and fastening systems.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 contract. User
3、s are responsible for its correctapplication. The British Standards Institution 2015. Published by BSI StandardsLimited 2015ISBN 978 0 580 69948 1ICS 49.030.20Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of th
4、eStandards Policy and Strategy Committee on 31 August 2015.Amendments issued since publicationDate Text affectedBS ISO 16130:2015 ISO 2015Aerospace series Dynamic testing of the locking behaviour of bolted connections under transverse loading conditions (vibration test)Aronautique et espace Essai dy
5、namique des caractristiques de freinage des lments de fixation, dans des conditions de charge transversale (essai de vibration)INTERNATIONAL STANDARDISO16130First edition2015-08-01Reference numberISO 16130:2015(E)BS ISO 16130:2015ISO 16130:2015(E)ii ISO 2015 All rights reservedCOPYRIGHT PROTECTED DO
6、CUMENT ISO 2015, Published in SwitzerlandAll 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 writte
7、n permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCh. de Blandonnet 8 CP 401CH-1214 Vernier, Geneva, SwitzerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgBS ISO 16130:2015IS
8、O 16130:2015(E)Foreword iv1 Scope . 12 Normative references 13 Terms and definitions . 14 Test principle . 25 Apparatus . 35.1 Schematic overview of components . 35.2 Test machine description . 35.3 Apparatus requirements 46 Test procedure 47 Test settings . 58 Evaluation 89 Documentation . 9Bibliog
9、raphy .11 ISO 2015 All rights reserved iiiContents PageBS ISO 16130:2015ISO 16130:2015(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 out
10、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 coll
11、aborates 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 approv
12、al 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/directives).Attention is drawn to the possibility that some of the elements of this document may be the sub
13、ject 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 (see www.iso.org/patents).Any trad
14、e 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 related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Tec
15、hnical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information.The committee responsible for this document is ISO/TC 20, Aircraft and space vehicles, Subcommittee SC 4, Aerospace fastener systems.iv ISO 2015 All rights reservedBS ISO 16130:2015INTERNATIONAL STANDARD ISO 1
16、6130:2015(E)Aerospace series Dynamic testing of the locking behaviour of bolted connections under transverse loading conditions (vibration test)1 ScopeThis International Standard applies to the dynamic testing of the locking behaviour of bolted connections in order to investigate the self-loosening
17、behaviour of fasteners for aerospace applications and is mainly intended for development work.As test apparatuses are different (e.g. stiffness distribution), testing in accordance with this International Standard, therefore, does not allow an absolute statement to be made on the locking behaviour o
18、f bolted assemblies under service loads.Thus, the objective of this test is a comparative evaluation of locking elements under defined test conditions.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its applica
19、tion. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 16047, Fasteners Torque/clamp force testing3 Terms and definitionsFor the purposes of this document, the terms and definitions give
20、n in ISO 16047 and the following apply.3.1clamp forceFaxial tension acting on the bolt shank or compression acting on the clamped memberSOURCE: ISO 16047:2005, 3.1; modified without restriction “during tightening”3.2ultimate clamp forceFutheoretical maximum clamp force under combined stress conditio
21、n potentially induced before bolt/nut failureSOURCE: ISO 16047:2005, 3.3, modified3.3initial clamp forceFMclamp force after tightening of test specimen before test3.4relative clamp force lossYYFFM=1 100*% ISO 2015 All rights reserved 1BS ISO 16130:2015ISO 16130:2015(E)3.5number of load cyclesNnumber
22、 of transverse movements of the glider plate of the apparatus3.6pitch diameterD2d2diameter of the pitch cylinder or pitch coneSOURCE: ISO 5408:2009, 5.9, modified without reference, without note3.7minor diameterD1d1d3diameter of an imaginary cylindrical or conical surface tangent to the roots of an
23、external thread and/or to the crests of an internal threadSOURCE: ISO 5408:2009, 5.3, modified without references, without notes3.8tightening torqueToverall torque applied on nut or bolt head in tighteningSOURCE: ISO 16047:2005, 3.4, modified without substitutes3.9self-locking torqueprevailing torqu
24、etorque to be applied to the nut or bolt to maintain its movement of rotation in relation to the associated part, the assembly being under no axial load, and the nut-locking system being completely engaged with the bolt (two pitches minimum protrusion, including the end chamfer)SOURCE: ISO 5858:1999
25、, 3.153.10transverse displacementtstransverse movement of the glider plate in both directions from fastener centre lineNote 1 to entry: It is expressed in millimetres.4 Test principleThe fasteners under test are tightened in a vibration testing machine to achieve a defined clamp force, FM, and then
26、subjected to dynamic transverse loading. No additional axial operating force is applied to the fasteners.The change in clamp force during the vibration test is measured.The test terminates after a specified number of load cycles or upon fracture of the bolt, stabilization of residual clamp force, or
27、 upon complete loss of clamp force.2 ISO 2015 All rights reservedBS ISO 16130:2015ISO 16130:2015(E)5 Apparatus5.1 Schematic overview of componentsSee Figure 1.Input driveLoad cycle sensorDisplacement sensorTransverse force sensorClamp force sensorEvaluation unitand datarecording device(e.g. PC)Vibra
28、tiontesting machineNOTE Transverse force sensor is optional.Figure 1 Schematic overview of components5.2 Test machine descriptionThe machine (see Figure 2 for an example of a vibration testing machine) essentially consists of e.g. a motor drive or a hydraulic drive generating a transverse displaceme
29、nt in the test fixture.The test fixture consists of a stationary base and a floating glider plate which acts as clamped members in the bolted joint in which the fastener to be tested is installed. The glider plate contains a rotationally immobilized washer (test washer). The stationary base accommod
30、ates a clamp force-sensor for measuring the clamp force between the glider plate and the stationary base. In the force-sensor, a test insert is used that it is locked to prevent it from rotating. The relative movement between the stationary base and the glider plate is measured with a displacement s
31、ensor. ISO 2015 All rights reserved 3BS ISO 16130:2015ISO 16130:2015(E)54321678Key1 infinitely adjustable eccentric 5/6 fastener test assembly2 connecting rod 7 displacement sensor3 transverse force sensor (optional) 8 clamp force sensor (axial)4 connecting plateFigure 2 Example of a vibration testi
32、ng machine5.3 Apparatus requirementsThe apparatus shall meet the following requirements.a) The relative movement (transverse displacement) between the stationary base and glider plate shall be infinitely variable, preferably during operation and adjusted through electronic control. In the thread dia
33、meter range up to 25,4 mm, the clamped-up testing facility shall permit relative movements of up to 1,5 mm between the stationary base and the glider plate.b) Testing frequency between 10 Hz and 15 Hz shall be possible; the frequency during the testing shall be at an accuracy of 3 %.c) Measurement u
34、ncertainty for the clamp force shall be within 2 % as measured on the entire measuring chain consisting of sensor, cable, charge amplifier, and data acquisition device. The entire measuring chain shall be calibrated accordingly.d) Measurement uncertainty for the transverse displacement shall be with
35、in 3 % as measured on the entire measuring chain consisting of sensor, cable, charge amplifier, and data acquisition device. The entire measuring chain shall be calibrated accordingly.e) The stationary base and the glider plate shall be concentric within 0,1 mm at the mid-position of transverse disp
36、lacement.f) The following variables are to be measured and recorded: initial clamp force, clamp force in relation to number of load cycles, test frequency, transverse displacement plus the applied installation torque values.g) The glider plate shall be precisely guided in the transverse direction wi
37、thin a tolerance of 0,10 mm of lateral movement.h) The stationary base and the glider plate shall be designed such that the clamp force cannot bend them. The gap between the stationary base and glider plate at fastener position shall be 1 mm 0,05 mm under load.6 Test procedureThe test procedure cons
38、ists of two elements; the reference test and the verification test.4 ISO 2015 All rights reservedBS ISO 16130:2015ISO 16130:2015(E)The reference tests are to be carried out on an unsecured bolted joint, assembled in the same way, and with the same parameters as specified for the verification tests t
39、hat will determine the securing effect of the securing element under test.During the reference tests, the effective transverse displacement is varied through corresponding adjustments to the drive for the test equipment (the stroke). For reasons of reproducibility, the transverse displacement at whi
40、ch the pre-stressing force is fully lost after 300 100 load cycles shall be ascertained three times, using new parts each time. This transverse displacement provides the basis for the verification tests.For reasons of reproducibility, a valid reference test shall be carried out three times, using ne
41、w parts each time. The verification test has to be done in the same condition and settings as the reference test.The glider plate is positioned to zero transverse displacement. The fasteners to be tested (bolt or nut) is inserted and tightened to the defined clamp force. The effective transverse dis
42、placement is verified continuously during the vibration test. The clamp force is recorded versus the number of load cycles (see Figure 3). The test is carried out at room temperature.If locking element is not damaged after test, it can be tested multiple times to validate self-locking behaviour at m
43、ultiple installation cycles, if required by test requester.7 Test settingsSelf-locking elements (e.g. nut, washer, split pin, lock wire, etc.) shall be tested typically with a transverse displacement ts= 0,5 mm for fastener dimensions up to and including M12/0.500” and ts= 0,8 mm for fastener dimens
44、ions above M12/0,500” and at a frequency of 12,5 Hz and with the clamp force specified in Table 1 and Table 2 (representing 75 % of calculated Fu). Clamp force has to be adjusted to the weakest element of the assembly either bolt or nut strength class.The length to diameter ratio shall be as short a
45、s possible and preferably around 2,0 to 2,5.Different test settings could be defined by test requester.To achieve reproducible results, the following factors need to be defined unambiguously:a) initial clamp force (see examples Table 1 and Table 2);b) testing frequency;c) effective transverse displa
46、cement;d) adjustment of the test fixture to the fastener length. ISO 2015 All rights reserved 5BS ISO 16130:2015ISO 16130:2015(E)Table1 Example of clamp force settings (metric series)Values in NewtonThreadClampforceaFMsetting N for strength class450MPa600MPa900MPa1000MPa1100MPa1210MPa1275MPa1500MPa1
47、800MPaMJ40,731464194629269917690845989131048612583MJ50,85073676410146112741240113641143741691020292MJ61,07212961714425160281763119394204352404228850MJ71,0102901372120581228682515427670291563430141162MJ81,0139001853327799308883397737375393824633255599MJ81,251312217496262442916032076352833717943739524
48、87MJ101,25217542900643509483435317758495616387251587018MJ101,5207672769041535461505076555841588416922583070MJ121,2532481433086496372181793998733992030108271129925MJ141,544023586988804797830107613118374124733146745176094MJ161,55884278456117684130760143836158219166719196140235367MJ181,5757821010431515
49、64168405185245203770214716252607303128MJ201,594844126458189688210764231840255024268724316146379375MJ221,5116027154702232053257837283621311983328742386756464107MJ242,0134806179741269611299568329525362477381949449352539222NOTE 1Clamp force setting=75% calculated Fu.NOTE 2Applying these values on regular metric series (see DIN13 and ISO965) will result in slightly higher test loads.aCalculated with mean values from ISO5855-2.6 ISO 2015 All rights reservedBS ISO 16130:2015ISO 16130
