SIST EN 17129:2019
(Main)Continuous-fibre-reinforced plastic composites - Pultruded unidirectional rods - Determination of tensile properties in parallel to the fibre direction
Continuous-fibre-reinforced plastic composites - Pultruded unidirectional rods - Determination of tensile properties in parallel to the fibre direction
This European Standard specifies a method for determining the tensile properties of pultruded, unidirectional rods made from continuous fibre-reinforced plastic composites, in parallel to fibre direction.
It is applicable to pultruded rods which diameters are preferably ranging from 3 mm to 20 mm.
This method is suitable for use with continuous-fibre-reinforced plastic composites made from carbon fibres and glass fibres.
This method is suitable for use with all polymer matrix systems reinforced with unidirectional fibres having a cylindrical shape.
This method is not intended to be used for testing specimens such as tubes or yarns already covered by other test methods.
Kontinuierliche faserverstärkte Kunststoffverbunde - Gezogene unidirektionale Stäbe - Bestimmung der Zugeigenschaften parallel zur Faserrichtung
Diese Europäische Norm legt ein Verfahren zur Bestimmung der Zugeigenschaften von parallel zur Faserrichtung stranggezogenen, unidirektionalen Stangen aus durchgehendem, faserverstärktem Kunststoffverbund fest.
Es ist für stranggezogene Stangen mit Durchmessern von vorzugsweise 3 mm bis 20 mm anwendbar.
Dieses Verfahren ist für die Anwendung mit durchgehend faserverstärkten Kunststoffverbunden aus Kohlefasern und Glasfasern geeignet.
Dieses Verfahren ist für die Anwendung mit allen Polymer Matrixsystemen geeignet, die mit unidirektionalen Fasern verstärkt sind und eine zylindrische Form haben.
Dieses Verfahren ist nicht für die Anwendung an Probekörpern wie Rohren oder Garnen vorgesehen, für die bereits andere Prüfverfahren vorliegen.
Composites plastiques renforcés de fibres continues - Joncs unidirectionnels pultrudés - Détermination des propriétés en traction parallèlement à la direction des fibres
Le présent document spécifie une méthode pour déterminer les propriétés en traction, parallèlement à la direction des fibres, des joncs unidirectionnels pultrudés constitués de composites plastiques renforcés de fibres continues.
Il s’applique aux joncs pultrudés dont les diamètres sont de préférence compris entre 3 mm et 20 mm.
La présente méthode convient aux composites plastiques renforcés de fibres continues de carbone ou de verre.
La présente méthode convient à tous les systèmes de matrices polymères renforcées de fibres unidirectionnelles de forme cylindrique.
La présente méthode n’est pas destinée à être utilisée pour soumettre à essai des éprouvettes telles que des tubes ou des fils déjà couverts par d’autres méthodes d’essai.
Z neskončnim vlaknom ojačeni kompozitni polimerni materiali - Vlečene enosmerne palice - Ugotavljanje nateznih lastnosti v smeri, vzporedni smeri vlakna
Ta evropski standard določa metodo za ugotavljanje nateznih lastnosti vlečenih enosmernih palic iz z neskončnim vlaknom ojačenih kompozitnih polimernih materialov v smeri, vzporedni smeri vlakna.
Uporablja se pri vlečenih palicah s priporočljivim premerom od 3 mm do 20 mm.
Ta metoda je primerna za uporabo pri z neskončnim vlaknom ojačenih kompozitnih polimernih materialih iz karbonskih vlaken in steklenih vlaken.
Ta metoda je primerna za uporabo pri sistemih iz polimerne matrice, ojačenih z enosmernimi vlakni cilindrične oblike.
Ta metoda ni namenjena za preskušanje vzorcev, kot so cevi ali preje, ki jih že zajemajo druge preskusne metode.
General Information
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.þHQHKontinuierliche faserverstärkte Kunststoffverbunde - Gezogene unidirektionale Stäbe - Bestimmung der Zugeigenschaften parallel zur FaserrichtungComposites plastiques renforcés de fibres continues - Joncs unidirectionnels pultrudés - Détermination des propriétés en traction parallèlement à la direction des fibresContinuous-fibre-reinforced plastic composites - Pultruded unidirectional rods - Determination of tensile properties in parallel to the fibre direction83.120Reinforced plasticsICS:Ta slovenski standard je istoveten z:EN 17129:2018SIST EN 17129:2019en,fr,de01-januar-2019SIST EN 17129:2019SLOVENSKI
STANDARD
SIST EN 17129:2019
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 17129
November
t r s z ICS
z uä s t r English Version
Continuousæfibreæreinforced plastic composites æ Pultruded unidirectional rods æ Determination of tensile properties in parallel to the fibre direction Composites plastiques renforcés de fibres continues æ Joncs unidirectionnels pultrudés æ Détermination des propriétés en traction parallèlement à la direction des fibres
Kontinuierliche faserverstärkte Kunststoffverbunde æ Gezogene unidirektionale Stäbe æ Bestimmung der Zugeigenschaften parallel zur Faserrichtung This European Standard was approved by CEN on
v June
t r s zä
egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä
translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Serbiaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä
EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Rue de la Science 23,
B-1040 Brussels
9
t r s z CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN
s y s t {ã t r s z ESIST EN 17129:2019
EN 17129:2018 (E) 2 Contents Page European foreword . 4 Introduction . 5 1 Scope . 6 2 Normative references . 6 3 Terms and definitions . 6 4 Principle and methods . 9 4.1 Principle . 9 4.2 Method . 9 5 Apparatus . 10 5.1 Testing machine . 10 5.1.1 General . 10 5.1.2 Test speed . 10 5.1.3 Grips . 10 5.1.4 Force indicator . 10 5.1.5 Strain indicator . 10 5.1.6 Recording of data . 11 5.2 Devices for measuring the diameters of the test specimens . 11 6 Test specimens . 11 6.1 Types and dimensions . 11 6.2 Preparation of specimens . 13 6.2.1 General . 13 6.2.2 End tabs . 13 6.2.3 Application of end tabs. 15 7 Number of test specimens . 15 8 Conditioning . 15 9 Procedure. 15 9.1 Test atmosphere . 15 9.2 Measurement of test specimen dimensions . 15 9.3 Gripping . 16 9.4 Prestresses . 16 9.5 Test speed . 16 9.6 Recording of data . 16 9.7 Validation of the failure mode . 16 10 Calculation and expression of results . 16 10.1 Tensile strength . 16 10.2 Strains determined with an extensometer . 17 10.3 Tensile modulus of elasticity . 17 10.3.1 General . 17 10.3.2 Chord slope . 17 10.3.3 Regression slope . 17 11 Precision . 18 12 Test report . 18 SIST EN 17129:2019
EN 17129:2018 (E) 3 Annex A (informative)
Example of alternative test fixture . 19 Annex B (informative)
Specimen preparation with bonded end tabs . 20 Bibliography . 22 SIST EN 17129:2019
EN 17129:2018 (E) 4 European foreword This document (EN 17129:2018) has been prepared by Technical Committee CEN/TC 249 “Plastics”, the secretariat of which is held by NBN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by May 2019, and conflicting national standards shall be withdrawn at the latest by May 2019. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights. According to the CEN-CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: 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, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SIST EN 17129:2019
EN 17129:2018 (E) 5 Introduction The method described in EN ISO 527-5, Plastics — Determination of tensile properties — Part 5: Test conditions for unidirectional fibre-reinforced plastic composites, is not applicable for unidirectional pultruded rods for the following reasons: a) a pultruded rod is submitted to internal residual tensile stresses which affect its tensile properties. To determine the true performance of a pultruded rod, it is necessary to perform the tensile tests on the entire rod. Alternative solutions such as dumb-bell shaped specimens are not appropriate; b) cylindrical test specimens are not described in EN ISO 527-5. SIST EN 17129:2019
EN 17129:2018 (E) 6 1 Scope This document specifies a method for determining the tensile properties of pultruded, unidirectional rods made from continuous fibre-reinforced plastic composites, in parallel to fibre direction. It is applicable to pultruded rods which diameters are preferably ranging from 3 mm to 20 mm. This method is suitable for use with continuous-fibre-reinforced plastic composites made from carbon fibres and glass fibres. This method is suitable for use with all polymer matrix systems reinforced with unidirectional fibres having a cylindrical shape. This method is not intended to be used for testing specimens such as tubes or yarns already covered by other test methods. 2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN ISO 527-1:2012, Plastics — Determination of tensile properties — Part 1: General principles (ISO 527-1:2012) EN ISO 291, Plastics — Standard atmospheres for conditioning and testing (ISO 291) EN ISO 3611, Geometrical product specifications (GPS) — Dimensional measuring equipment: Micrometers for external measurements — Design and metrological characteristics (ISO 3611) EN ISO 7500-1:2018, Metallic materials — Calibration and verification of static uniaxial testing machines — Part 1: Tension/compression testing machines — Calibration and verification of the force-measuring system (ISO 7500-1:2018) EN ISO 9513:2012, Metallic materials — Calibration of extensometer systems used in uniaxial testing (ISO 9513:2012) 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN ISO 527-1:2012 and the following apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: — IEC Electropedia: available at http://www.electropedia.org/ — ISO Online browsing platform: available at http://www.iso.org/obp 3.1 gauge length L0 initial distance between the gauge marks on the central part of the test specimen Note 1 to entry: It is expressed in millimetres (mm). [SOURCE: EN ISO 527-1:2012, definition 3.1] SIST EN 17129:2019
EN 17129:2018 (E) 7 3.2 diameter d initial dimension of the cylindrical cross section in the central part of a test specimen Note 1 to entry: It is expressed in millimetres (mm). 3.3 test speed rate of separation of the gripping jaws Note 1 to entry: It is expressed in millimetres per minute (mm/min). [SOURCE: EN ISO 527-1:2012, definition 3.5] 3.4 stress
force per unit area of the original cross-section within the gauge length Note 1 to entry: It is expressed in megapascals (MPa). [SOURCE: adapted from EN ISO 527-1:2012, definition 3.6] 3.5 tensile strength M maximum tensile stress sustained by the specimen during a tensile test Note 1 to entry: It is expressed in megapascals (MPa). Note 2 to entry: It is corresponding to the stress at break. 3.6 strain
increase in length per unit original length Note 1 to entry: It is expressed as a dimensionless ratio, or as a percentage (%). [SOURCE: EN ISO 527-1:2012, definition 3.7] 3.7 tensile strain at tensile strength tensile failure strain M tensile strain at the point corresponding to the tensile strength Note 1 to entry: It is expressed as a dimensionless ratio, or as a percentage (%). Note 2 to entry: See Figure 1. Note 3 to entry: It is corresponding to the strain at break. SIST EN 17129:2019
EN 17129:2018 (E) 8 3.8 modulus tensile modulus of elasticity Et slope of the stress/strain curve () in the strain interval between 1 = 0,1 % and 2 = 0,5 % Note 1 to entry: It is expressed in gigapascals (GPa). Note 2 to entry: Other strain interval can be used unless alternative values are given in the material or technical specifications or agreed upon by the interested parties. 3.9 specimen coordinate axes coordinate axes for the material under test, as shown in Figure 2, the direction parallel to the fibres being defined as the “1”-direction and the direction perpendicular to them (in the plane of the fibres) as the “2”-direction Note 1 to entry: The “1”-direction is also referred to as the longitudinal direction and the “2”-direction as the transverse direction.
Key X strain,
Y stress,
a slope, Et Figure 1 — Typical stress-strain curve SIST EN 17129:2019
EN 17129:2018 (E) 9
Figure 2 — Unidirectional rod showing axes of symmetry 4 Principle and methods 4.1 Principle The test specimen is extended along its major longitudinal axis at constant speed until the specimen fractures or until the stress (load) or the strain (elongation) reaches some predetermined value. During this procedure the load sustained by the specimen and the elongation are measured. 4.2 Method 4.2.1 The use of conventional grips for testing unidirectional pultruded rods having high axial tensile strength and low transverse compressive strength can cause crushing of the rod, thereby causing premature failure, due to the high compressive forces exerted by the grips. Steel tabs, the design of which is adapted to the shape of the rod, reduce the compressive forces exerted on the rod and overcome this negative influence of conventional grips. NOTE Conventional metallic tabs offer a high performance level and have been found satisfactory for testing rods. However, some limitations such as testing at low or high temperature have led to use alternative test fixtures. Alternative test fixtures may be used provided that the radial compression on the rods prevents any slippage of the specimens relatively to the fixture during testing and that the failures occur outside of the gripping areas. As testing rods of larger diameter, than the standard 6 mm diameter rod, has some limitations (e.g. testing machines of high capacity required, high load transfer into specimens) smaller specimens and alternative fixtures may be used provided that the general requirements of this document are fulfilled. Informative Annex A describes an alternative test fixture, which may be used for testing specimens without end-tabs. 4.2.2 Tests which are carried out on specimens of different dimensions, or on specimens which are prepared under different conditions, may produce results which are not comparable. Other factors,
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