1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS ISO 12817:2013Fibre-reinforced plastic composites Determination of open-hole compression strengthBS ISO 12817:2013 BRITISH STANDARDNational forewordThis British Standard is th
2、e UK implementation of ISO 12817:2013. The UK participation in its preparation was entrusted to T e c h n i c a l Committee PRI/42, Fibre reinforced thermosetting plastics and prepregs.A list of organizations represented on this committee can be obtained on request to its secretary.This publication
3、does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2013. Published by BSI Standards Limited 2013.ISBN 978 0 580 66126 6 ICS 83.120 Compliance with a British Standard cannot confer immunityfrom l
4、egal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2013.Amendments issued since publicationDate T e x t a f f e c t e dBS ISO 12817:2013 ISO 2013Fibre-reinforced plastic composites Determination of open-hole compression
5、 strengthComposites plastiques renforcs de fibres Dtermination de la rsistance la compression avec trou nuINTERNATIONAL STANDARDISO12817First edition2013-03-15Reference numberISO 12817:2013(E)BS ISO 12817:2013ISO 12817:2013(E)ii ISO 2013 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2013All ri
6、ghts 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 from
7、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 12817:2013ISO 12817:2013(E) ISO 2013 All rights res
8、erved iiiContents PageForeword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 24 Principle 25 Apparatus . 36 Test specimens 96.1 Shape and dimensions 96.2 Alternative specimen . 96.3 Preparation of test plates and specimens . 116.4 Inspection of test specimens 116.5 Num
9、ber of test specimens 117 Conditioning .128 Procedure128.1 Test atmosphere . 128.2 Measurement of dimensions of the test specimens .128.3 Mounting of the test specimens 128.4 Test speed . 128.5 Preliminary loading . 128.6 Recording 128.7 Failure mode 139 Calculation .139.1 Open-hole compressive stre
10、ngth . 139.2 Expression of results . 1410 Precision .1411 Test report 16Bibliography .17BS ISO 12817:2013ISO 12817:2013(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International S
11、tandards 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 organizations, governmental and non-governmental, in liaison with ISO, als
12、o take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.The main task of technical committees
13、 is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.Attention is drawn to the possibil
14、ity 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 12817 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 13, Composites and reinforcement fibres.iv ISO 2013 A
15、ll rights reservedBS ISO 12817:2013ISO 12817:2013(E)IntroductionIn preparing this (harmonized) International Standard, reference has been made to other similar open-hole compression methods (JIS K 7093,1ASTM D6484/D6484M-092) and related methods, i.e. open-hole tension in ASTM D5766/D5766M63and pin-
16、bearing in ISO 12815.4The scope covers all current and future fibre-reinforced plastic composites meeting the requirements of this International Standard. This International Standard incorporates three methods that have different suitability and do not necessarily yield identical properties. All the
17、 methods use the maximum load to define the open-hole compressive strength. ISO 2013 All rights reserved vBS ISO 12817:2013BS ISO 12817:2013Fibre-reinforced plastic composites Determination of open-hole compression strength1 ScopeThis International Standard specifies the test method to determine the
18、 open-hole compressive strength of laminated fibre-reinforced plastic composites. The laminate is intended to be a balanced and symmetrical lay-up or be otherwise homogeneous through the thickness. This International Standard applies to all textile diameter fibre types (carbon, glass, aramids, etc.)
19、 and matrices (e.g. thermoset, thermoplastic) that meet the requirements of this International Standard.This International Standard includes three methods: method 1 (short specimen with support fixture); method 2 (short specimen without support fixture); method 3 (long specimen with support fixture
20、as in ASTM D6484/D6484M-09, methods A and B).Method 1 employs an L-shaped base fixture and two end fixtures. These end fixtures are compressed between the platens of the test machine.Method 2 employs end supports similar to the fixtures given in C.1 of ISO 14126:1999. Method 2 is useful for cyclic l
21、oading conditions test, including under fully or partly reversed loading conditions when the specimen is clamped by hydraulic grips without support fixturesMethod 3 has two types of loading methods, i.e. 3A and 3B. In method 3A, the specimen is placed within a stabilization fixture, which is then cl
22、amped by hydraulic grips. In method 3B, the specimen is placed within a stabilization fixture and then end-loaded by platens. Full details of test methods 3A and 3B are given in ASTM D6484/D6484M-09, procedure A and procedure B, respectively.NOTE Specimen configurations and force introduction varies
23、 for the three methods covered within this International Standard. Results obtained using methods 1, 2 and 3 might not be equivalent for all laminates in all environments.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispens
24、able to its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 291, Plastics Standard atmospheres for conditioning and testingISO 472, Plastics VocabularyISO 1268 (all parts),
25、 Fibre-reinforced plastics Methods of producing test platesISO 2818, Plastics Preparation of test specimens by machiningISO 5893, Rubber and plastics test equipment Tensile, flexural and compression types (constant rate of traverse) SpecificationISO 14126:1999, Fibre-reinforced plastic composites De
26、termination of compressive properties in the in-plane directionINTERNATIONAL STANDARD ISO 12817:2013(E) ISO 2013 All rights reserved 1BS ISO 12817:2013ISO 12817:2013(E)3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 472 and the following apply.3.1open
27、-hole diameterdiameter of the open hole in the centre of the test specimenNote 1 to entry: Open-hole diameter is expressed in millimetres (mm).Note 2 to entry: See Figure 1.3.2widthwoverall width of the specimenNote 1 to entry: Width is expressed in millimetres (mm).3.3coordinate axes of a test spec
28、imendirection parallel with the plate longitudinal axis, which is the X direction and the direction perpendicular, which is the Y directionNote 1 to entry: See ISO 1268-4.3.4open-hole compressive stressvalue obtained by dividing a compressive load applied to a test specimen by the gross cross-sectio
29、n based on the overall width and thickness of the test specimenNote 1 to entry: Open-hole compressive stress is expressed in megapascals (MPa).3.5open-hole compressive strengthmaximum open-hole compressive stress generated in the test specimenNote 1 to entry: Open-hole compressive strength is expres
30、sed in megapascals (MPa).4 PrincipleA test specimen consisting of a strip of rectangular cross-section with a plain open hole centrally positioned, as shown in Figure 1, is loaded in compression. The maximum load sustained by the specimen is used to determine the open-hole (notched) compressive stre
31、ngth based on the gross specimen cross-section.2 ISO 2013 All rights reservedBS ISO 12817:2013ISO 12817:2013(E)KeyY load direction1 open holeFigure 1 Open-hole laminated composite test specimen and load direction5 Apparatus5.1 Test machine5.1.1 General, the machine shall conform to ISO 5893, as appr
32、opriate to the requirements given in 5.1.2 and 5.1.3.5.1.2 Speed of testing. The test machine shall be capable of maintaining the required speed of testing (see 8.4).5.1.3 Indication of load, the error for the indicated load not exceeding 1 %.5.1.4 Load measurement system, comprising a mechanism to
33、indicate continuously the compressive load applied to the test piece. The loading mechanism shall not cause delay due to inertia at the specified test speed and shall indicate the load value with a precision equal to or higher than 1 % of the full scale of load cell measurement capacity.5.1.5 Loadin
34、g platens (method 1 and method 3B), each (platen plate) being located on the movable part (platen plate) and fixed part (base plate), respectively, of the test machine and the centre of the upper and lower pressing faces coinciding with the centreline of the loading direction of the test machine. Th
35、e alignment of the test fixture shall enable a compressive load to be applied to the platen plate and the base plate in the axial direction of a test specimen, and forces other than the compressive load shall be minimized.5.1.6 Hydraulic grips (method 2 and method 3A), each located on the movable an
36、d fixed parts, respectively, of the test machine and the centre of the upper and lower grips coinciding with the centreline of the load gauge. The test set-up arrangement shall be such that a compressive load is applied to the upper and lower grips in the axial direction of a test specimen, and forc
37、es other than the compressive load shall be minimized. ISO 2013 All rights reserved 3BS ISO 12817:2013ISO 12817:2013(E)5.2 Test fixtures, for method 1 and method 3, which support the test specimen to prevent buckling phenomenon, and which apply compressive load to the test specimen. They shall be ma
38、de of low-carbon steel or stainless steel. Figure 2 shows an outline of the out-of-plane deformation support fixture assembly for method 1. Figures 3 to 7 show detailed dimensions of the out-of-plane deformation support fixture, L-shaped base plate, end-loading fixtures and support fixture for metho
39、d 1.Method 3 requires out-of plane support fixtures. There are two compression-loading conditions for method 3, shear loaded by clamped hydraulic wedge grips (method 3A) and end loaded by platen plates (method 3B). Methods 3A and 3B require the same stabilization fixture. Details of the support fixt
40、ure for method 3 are given in ASTM D6484/D6484M-09.123Key1 out-of-plane deformation support fixture2 end-loading fixtures3 L-shaped base plateFigure 2 Outline of the fixture4 ISO 2013 All rights reservedBS ISO 12817:2013ISO 12817:2013(E)Dimensions in millimetresKey1 S55C, quenched, HRC 502 2 M6 coun
41、tersunk screw3 relief radius R0,1 plate R0,54 4 M8 1,25 throughFigure 3 L-shaped base plate for method 1 ISO 2013 All rights reserved 5BS ISO 12817:2013ISO 12817:2013(E)Dimensions in millimetresKey1 2 M8 1,252 relief radius R0,1 maximumFigure 4 End-loading fixture (upper) for method 1Dimensions in m
42、illimetresKey1 2 M8 1,252 relief radius R0,1 maximumFigure 5 End-loading fixture (lower) for method 16 ISO 2013 All rights reservedBS ISO 12817:2013ISO 12817:2013(E)Dimensions in millimetresKey1 2 M8 1,252 relief radius R0,1 maximumFigure 6 End-loading fixture plate for method 1 (quantity: 2, common
43、 for the upper and lower) ISO 2013 All rights reserved 7BS ISO 12817:2013ISO 12817:2013(E)Dimensions in millimetresKey1 strain gauge bonding area (strain gauge shall be located on the specimen) (6,8 18,9 mm, machined to grooved bottom surface)Figure 7 Out-of-plane support fixture for method 1 (quant
44、ity: two sets)5.3 Micrometers and calipersa) Vernier caliper, used to measure the length and width of the test specimen, and having a precision of 0,05 mm or better.b) Micrometer or equivalent, used to measure the specimen thickness and open-hole diameter of a test specimen, and having a precision o
45、f 0,01 mm or better. The micrometer shall have faces appropriate to the surface being measured (i.e. flat faces for flat, polished surfaces and hemispherical faces for irregular surfaces).8 ISO 2013 All rights reservedBS ISO 12817:2013ISO 12817:2013(E)6 Test specimens6.1 Shape and dimensionsThe majo
46、r dimensions of these test specimens are shown as specified in Table 1, and are shown in Figures 8 and 9. Details of the test specimen for method 3 are given in ASTM D6484/D6484M-09.Table 1 Dimensions of test specimens for methods 1 and 2Dimensions in millimetresItem Method 1 Method 2 Method 3aWidth
47、 b 36,0 0,25 36,0 0,5 36Length l 118,0 + 2,0/-0 125.0 1,0 300Thickness h 2,5 (std.) 4,0 (min.) 4Open-hole diameter d 6,0 0,08 6,0 0.02 6aMean values only; see ASTM D6484/D6484M for tolerances.6.2 Alternative specimenAlternative specimens shall maintain a specimen width-to-hole diameter ratio of 6.NO
48、TE A 0,25“ (6,35mm) hole in a 1,5” (38,1 mm) wide specimen meets this requirement. ISO 2013 All rights reserved 9BS ISO 12817:2013ISO 12817:2013(E)Dimensions in millimetresaParallelism of top and bottom surfaces shall be within 0,02 mm for method 1.bPerpendicularity of top and bottom surfaces agains
49、t plane C shall be within 0,02 mm for method 1.cHole shall be free of ply peeling or other damage.dSeal side.Figure 8 Shape and dimensions of the test specimen for method 110 ISO 2013 All rights reservedBS ISO 12817:2013ISO 12817:2013(E)Dimensions in millimetresaEnd tabs are not normally required. Guidance on tabbing materials and method, if required, is given in ISO 527-4.Figure 9 Shape and dimensions of the test specimen for method 26.3 Preparation
