1、BRITISH STANDARD BS EN ISO 14130:1998 Incorporating Technical Corrigendum No. 1 Fibre-reinforced plastic composites Determination of apparent interlaminar shear strength by short-beam method The European Standard EN ISO 14130:1997 has the status of a British Standard ICS 83.120 BS EN ISO 14130:1998
2、This British Standard, having been prepared under the direction of the Sector Board for Materials and Chemicals, was published under the authority of the Standards Board and comes into effect on 15 April 1998 BSI 7 May 2004 ISBN 0 580 29467 6 National foreword This British Standard is the English la
3、nguage version of EN ISO 14130:1997. It is identical with ISO 14130:1997, including Technical Corrigendum November 2003. The UK participation in its preparation was entrusted to Technical Committee PRI/42, Fibre reinforced thermosetting plastics and prepregs, which has the responsibility to: aid enq
4、uirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations
5、represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence I
6、ndex”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself c
7、onfer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN ISO title page, the EN ISO foreword page, the ISO title page, page ii, pages 1 to 8, an inside back cover and a back cover. The copyright notice displayed in this document ind
8、icates when the document was last issued. Amendments issued since publication Amd. No. Date Comments 15091 7 May 2004 Changes to 2, 4.1, 4.2, 6.2, 9.2, 9.7, 10.1, 10.3 and Figure 4EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 14130 December 1997 ICS 83.120 Descriptors: see ISO document En
9、glish version Fibre-reinforced plastic composites Determination of apparent interlaminar shear strength by short-beam method (ISO 14130:1997) Composites plastiques renforcs de fibres Dtermination de la rsistance au cisaillement interlaminaire apparent par essai de flexion sur appuis rapprochs (ISO 1
10、4130:1997) Faserverstrkte Kunststoffe Bestimmung der scheinbaren interlaminaren Scherfestigkeit nach dem Dreipunktverfahren mit kurzem Balken (ISO 14130:1997) This European Standard was approved by CEN on 23 November 1997. CEN members are bound to comply with the CEN/CENELEC Internal Regulations whi
11、ch 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 Central Secretariat or to any CEN member. This European Sta
12、ndard 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 Central Secretariat has the same status as the official versions. CEN members are the national sta
13、ndards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komit
14、ee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1997 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 14130:1997 EEN ISO 14130:1997 BSI 7 May 2004 Foreword The text of the International Standard ISO 14130:
15、1997 has been prepared by Technical Committee ISO/TC 61 “Plastics” in collaboration with Technical Committee CEN/TC 249 “Plastics”, the secretariat of which is held by IBN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endor
16、sement, at the latest by June 1998, and conflicting national standards shall be withdrawn at the latest by June 1998. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cz
17、ech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of the International Standard ISO 14130:1997 was approved by CEN as a European Standard without
18、any modification. NOTE Normative references to International Standards are listed in Annex ZA (normative).Incorporating Technical Corrigendum 2003-11-01EN ISO 14130:1997 ii Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO m
19、ember 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 organizations, governm
20、ental 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. Draft International Standards adopted by the technical committees are circulated to the m
21、ember bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard ISO 14130 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 13, Composites and reinforcement fibres. It cancels and
22、replaces International Standard ISO 4585:1989. The main changes are as follows: The scope of ISO 4585 has been extended to include all current and future textile-diameter fibre-reinforced plastic composites which fail in the required manner, with an additional requirement for a standard specimen thi
23、ckness of 2 mm. The 3 mm thick specimen is still available as an alternative using the specimen scaling rules given in 6.1.2, but, although the test span at 15 mm is the same as previously, the width is now 15 mm (cf. 10 mm previously). Descriptors: plastics, reinforced plastics, tests, shear tests,
24、 determination, shear strength, test specimens.EN ISO 14130:1997 BSI 7 May 2004 1 1 Scope 1.1 This International Standard specifies a procedure for determining the apparent interlaminar shear strength of fibre-reinforced plastic composites by the short-beam method. 1.2 The method is suitable for use
25、 with fibre-reinforced plastic composites with a thermoset or a thermoplastic matrix, providing interlaminar shear failure is obtained. NOTE When using other than laminated materials which are not symmetrical and balanced, the results may be affected by various couplings such as extension/bending, b
26、ending/twisting, etc. 1.3 The method is not suitable for the determination of design parameters, but may be used for screening materials, or as a quality-control test. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of th
27、is International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicate
28、d below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 291:1997, Plastics Standard atmospheres for conditioning and testing. ISO 1268 (all parts), Fibre-reinforced plastics Methods of producing test plates. ISO 2602:1980, Statistical interpretation of test
29、 results Estimation of the mean Confidence interval. ISO 2818:1994, Plastics Preparation of test specimens by machining. ISO 5893:2002, Rubber and plastics test equipment Tensile, flexural and compression types (constant rate of traverse) Specification. 3 Principle A bar of rectangular cross-section
30、 is loaded as a simple beam in flexure so that interlaminar shear failure occurs. The bar rests on two supports and the load is applied by means of a loading member midway between the supports. NOTE 1 The test is similar in nature to the three-point loading method used to determine the flexural prop
31、erties of plastics (ISO 14125, Fibre-reinforced plastic composites Determination of flexural properties). However, a smaller test span/specimen thickness ratio is adopted to increase the level of shear stress relative to the flexural stress in the test specimen to encourage interlaminar shear failur
32、e. NOTE 2 It is emphasized that the result obtained is not an absolute value. For this reason the term “apparent interlaminar shear strength” is used to define the quantity measured. Test results from different-sized specimens, or from specimens tested under different conditions, are not directly co
33、mparable. 4 Definitions For the purposes of this International Standard, the following definitions apply: 4.1 apparent interlaminar shear stress, the interlaminar shear stress acting on the neutral plane of the specimen It is calculated from Equation (1) in 10.1 and is expressed in megapascals (MPa)
34、. 4.2 apparent interlaminar shear strength, M the value of the apparent interlaminar shear stress at failure or when the load reaches a maximum value It is calculated from Equation (2) in 10.1 and is expressed in megapascals (MPa). 4.3 span, L the distance between the two specimen supports in the te
35、st machine It is expressed in millimetres (mm).EN ISO 14130:1997 2 BSI 7 May 2004 4.4 specimen coordinate axes (for aligned materials) the coordinate axes for the material under test are defined in Figure 1. The direction parallel to the fibre axes is defined as the “1” direction and the direction p
36、erpendicular to it the “2” direction. For other materials, the 1, 2 and 3 directions are generally described by the x, y, z system of coordinates NOTE 1 The “1” direction is also referred to as the 0 degree (0 ) or longitudinal direction, and the “2” direction as the 90 degree (90 ) or transverse di
37、rection. NOTE 2 A similar definition can be used for material with a preferred fibre lay-up or in cases where a direction (e.g. the lengthwise direction) can be related to the production process (i.e. directions A and B in Figure 3). 5 Apparatus 5.1 Test machine 5.1.1 General The machine shall confo
38、rm to ISO 5893 as appropriate to the requirements given in 5.1.2 and 5.1.3. 5.1.2 Speed of testing The speed of testing v shall be kept constant in accordance with ISO 5893. 5.1.3 Load indicator The load indicator shall be such that the error in the indicated load is less than 1 % of full scale (see
39、 ISO 5893). 5.2 Loading member and supports The radius of the loading member r 1shall be 5 mm 0,2 mm and that of the supports r 2shall be 2 mm 0,2 mm (see Figure 2). The width of the loading member and the supports shall be greater than the test specimen width. The loading member shall apply the loa
40、d mid-way between the supports. The span (distance between the supports) shall be adjustable. 5.3 Micrometer, or equivalent, capable of reading to 0,01 mm or less, and suitable for measuring the width b and thickness h of the test specimen. The micrometer shall have contact faces appropriate to the
41、surface being measured (i.e. flat faces for flat, polished surfaces and hemispherical faces for irregular surfaces). Figure 1 Unidirectional reinforced composite plate element showing symmetry axesEN ISO 14130:1997 BSI 7 May 2004 3 6 Test specimens 6.1 Shape and dimensions 6.1.1 Standard specimen si
42、ze Unless 6.1.2 applies, test specimens shall comprise rectangular bars of uniform thickness with the dimensions given in Table 1. Table 1 6.1.2 Other test specimens When it is not possible or not desirable to use the standard specimen, the following rules shall be observed: the length and the thick
43、ness of the test specimen shall be in the same ratio as in the standard specimen, i.e. l = 10h the width shall be chosen in the same ratio to the thickness as in the standard specimen, i.e. b = 5h NOTE Depending upon the material being tested, specimens of 2 mm thickness may fail by shear or experie
44、nce compression failure under load or exhibit extreme deflection without shear failure. As specimen thickness (height) is increased, the probability of compression failure under load increases and the probability of extreme deflection with no failure decreases. As specimen thickness is decreased, th
45、e reverse is true. It is important to select a specimen thickness that will cause specimens to fail by horizontal shear (see 9.7). 6.2 Preparation of specimens Machine the test specimens from a moulded blank or sheet, prepared in accordance with the relevant part of ISO 1268 or another specified/agr
46、eed procedure. Some parameters for machining are given in ISO 2818. Figure 2 Loading configuration Thickness, h Overall length, l Width, b mm mm mm 2 0,2 20 1 10 0,2EN ISO 14130:1997 4 BSI 7 May 2004 6.3 Checking the test specimens The specimens shall be flat and free of twist. The surfaces and edge
47、s shall be free from defects. The thickness along the whole length shall be within 5 % of the mean thickness. The width of individual specimens shall be constant to within 0,2 mm. Specimens showing measurable or observable departure from one or more of these requirements shall be rejected or machine
48、d to the required size and shape before testing. 7 Number of test specimens 7.1 At least five test specimens shall be tested. 7.2 When the fibre orientation and distribution in the material to be tested does not differ significantly between the two principal directions, shear specimens shall be take
49、n in each of these two directions (see Figure 3, specimens A and B). When the material has a preferred orientation, the specimens shall be taken in this direction. 8 Conditioning Where applicable, condition the test specimens as specified in the standard for the material under test. In the absence of such information, select the most appropriate conditions from ISO 291, unless agreed otherwise by the interested parties. 9 Procedure 9.1 Test atmo
