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1、INTERNATIONAL STANDARD ISO 1209-2 Third edition 2007-05-01 Reference number ISO 1209-2:2007(E) ISO 2007 Rigid cellular plastics Determination of flexural properties Part 2: Determination of flexural strength and apparent flexural modulus of elasticity Plastiques alvolaires rigides Dtermination des p
2、roprits de flexion Partie 2: Dtermination de la rsistance la flexion et du module apparent dlasticit en flexion Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 05/16/2007 01:48:23 MDT
3、No reproduction or networking permitted without license from IHS -,-,- ISO 1209-2:2007(E) ii ISO 2007 All rights reserved PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typ
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8、b www.iso.org Published in Switzerland Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 05/16/2007 01:48:23 MDTNo reproduction or networking permitted without license from IHS -,-,- IS
9、O 1209-2:2007(E) ISO 2007 All rights reserved iii Contents Page 1Scope 1 2Normative references 1 3Principle 1 4Apparatus . 1 5Test specimens 2 6Conditioning and test conditions . 3 7Procedure . 3 8Expression of results 4 9Precision . 5 10Test report 5 Copyright International Organization for Standar
10、dization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 05/16/2007 01:48:23 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 1209-2:2007(E) iv ISO 2007 All rights reserved Foreword ISO (the International Organi
11、zation for Standardization) is a worldwide federation of national standards bodies (ISO member 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 establishe
12、d 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 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
13、International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Pub
14、lication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility 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
15、 rights. ISO 1209-2 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 10, Cellular plastics. This third edition cancels and replaces the second edition (ISO 1209-2:2004), which has been technically revised. ISO 1209 consists of the following parts, under the general title Rigi
16、d cellular plastics Determination of flexural properties: Part 1: Basic bending test Part 2: Determination of flexural strength and apparent flexural modulus of elasticity Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/111111100
17、1, User=Wing, Bernie Not for Resale, 05/16/2007 01:48:23 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARDISO 1209-2:2007(E) ISO 2007 All rights reserved 1 Rigid cellular plastics Determination of flexural properties Part 2: Determination of flexural st
18、rength and apparent flexural modulus of elasticity 1Scope This part of ISO 1209 specifies a method for determining the flexural strength and the apparent flexural modulus of elasticity of rigid cellular plastics. 2Normative references The following referenced documents are indispensable for the appl
19、ication 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. ISO 1923, Cellular plastics and rubbers Determination of linear dimensions 3Principle A load is applied at a unifo
20、rm rate by means of a loading edge to a test specimen supported at two positions. The load is applied perpendicularly to the specimen at a position midway between the supporting positions (see Figure 1). The load/deformation curve is recorded. From the curve, the flexural strength and the apparent f
21、lexural modulus of elasticity are calculated. 4Apparatus 4.1Test machine, consisting of a universal mechanical-testing machine capable of operating at a constant rate of movement of the moveable head. The range of the test machine shall be such that the applied load can be measured with an accuracy
22、of . The machine shall include a device for simultaneous recording of force and the corresponding deformation. 4.2Test specimen support, consisting of two parallel cylindrical support edges set in the same horizontal plane, each having an edge radius of . The length of the support edges shall be gre
23、ater than the width of the test specimens. The span between the support edges shall be adjustable in the range to . The recommended span is . 4.3Test specimen loading edge, having the same shape and dimensions as the support edges. The loading edge shall be located midway between and parallel to the
24、 support edges. 4.4Dial-gauge micrometer, as described in ISO 1923. 1 % (151)mm L200 mm450 mm 300 mm Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 05/16/2007 01:48:23 MDTNo reproduc
25、tion or networking permitted without license from IHS -,-,- ISO 1209-2:2007(E) 2 ISO 2007 All rights reserved 5Test specimens 5.1Shape and dimensions Each test specimen shall be a rectangular parallelepiped having the dimensions given, together with the corresponding values of the span between the s
26、upport edges, in Table 1. 5.2Preparation Test specimens shall be cut without deformation of the original cell structure. The test specimens may have a skin on one or more sides. If so, this fact shall be recorded. Key 1loading edge with cylindrical edge having a radius of 2support edges with cylindr
27、ical edge having a radius of 3test specimen distance between support edges test specimen length test specimen thickness applied force Figure 1 Side view of test specimen and support edges Table 1 DimensionRecommended valueLimit(s) on value mmmm Length350 Width Thickness 2515 to 38 Span 300 to NOTEAt
28、 high thickness values, it will be necessary to select a span value at the low end of the range to in view of the limits on the adjustment of the span (see 4.2, second paragraph). Conversely, at low thickness values, it will be necessary to select a span value at the high end of the range to . (151)
29、mm (151)mm L l d F L ?(L +50) b4d?2d d L12d16d 12d16d 12d16d Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 05/16/2007 01:48:23 MDTNo reproduction or networking permitted without lic
30、ense from IHS -,-,- ISO 1209-2:2007(E) ISO 2007 All rights reserved 3 5.3Number At least five specimens shall be tested for each sample. When testing materials which are suspected of being anisotropic, duplicate sets of test specimens shall be prepared having axes respectively parallel to and normal
31、 to the suspected direction of anisotropy. When testing specimens with only one surface skin, unless otherwise specified, duplicate sets of test specimens shall be tested, one set with the skin in tension and one set with the skin in compression. Report the results separately. 6Conditioning and test
32、 conditions Condition the test specimens for a minimum of at the conditions under which testing will be carried out. Normal test conditions are and R.H.; and R.H.; and R.H. Temperatures of , , , and are preferred alternative temperatures, although other conditions may be used, for example those refl
33、ecting end use. 7Procedure Determine the dimensions of the test specimens in accordance with ISO 1923. Place a test specimen symmetrically upon the support edges and apply an increasing force perpendicular to the longitudinal axis of the specimen by moving the loading edge at a constant speed of: fo
34、r the determination of the apparent flexural modulus; either or for the determination of other flexural properties. Record the force/deformation curve and draw a line tangential to the steepest part of the curve (see Figure 2). Record the breaking load when the break occurs before deflection is reac
35、hed. It is normally not necessary to continue the test beyond a flexural strain of . NOTEWith the recommended test specimen and loading arrangement, the strain is at when the deflection reaches . Inspect the test specimen for any sign of crushing. If any crushing is found, disregard the flexural str
36、ength value. 6 h (232) C (5010)% (235) C 50+20 10% (275) C 65+20 10% 196 C 70 C 10 C 0 C 40 C (201)mm/min (201)mm/min(10010)mm/min 5 % 5 % 5 % 30 mm Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie No
37、t for Resale, 05/16/2007 01:48:23 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 1209-2:2007(E) 4 ISO 2007 All rights reserved 8Expression of results 8.1The flexural strength is given, in kilopascals, by the equation: where is the maximum force applied, in kilonewtons;
38、 is the span between the support edges, in millimetres; is the test specimen width, in millimetres; is the test specimen thickness, in millimetres. 8.2The apparent flexural modulus of elasticity is given, in kilopascals, by the equation: Key Xdeflection (mm) Yforce (kN) 1tangent 2break Figure 2 Typi
39、cal force/deformation diagram R R =1,5FR L bd2 106 FR L b d E E = L3 4bd3 Ft xt 106 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 05/16/2007 01:48:23 MDTNo reproduction or networkin
40、g permitted without license from IHS -,-,- ISO 1209-2:2007(E) ISO 2007 All rights reserved 5 where is the force, in kilonewtons, corresponding to the deflection (see Figure 2); is the corresponding deflection, in millimetres; , and are as defined in 8.1. 9Precision An interlaboratory test was perfor
41、med with 10 laboratories in 1993. Four products with different flexural characteristics were tested, three of which were used for statistical evaluation of the reproducibility (two test results for each product) while one product was used for statistical evaluation of the repeatability (five test re
42、sults). The results, analysed in accordance with ISO 5725:1986, Precision of test methods Determination of repeatability and reproducibility for a standard test method by inter-laboratory tests (now withdrawn), are given in Table 1. 10Test report The test report shall include the following informati
43、on: a)a reference to this part of ISO 1209; b)a description and identification of the material; c)the presence or absence of skins or facings on the test specimens and, if applicable, on which faces; d)the conditioning procedure used; e)the dimensions of the test specimens; f)the span between the su
44、pport edges and the speed of the loading edge; g)the test conditions (temperature, humidity); h)the direction of application of the force with respect to any anisotropy; i)the individual values of the flexural strength, in kilopascals; j)the individual values of the apparent flexural modulus of elas
45、ticity, in kilopascals; k)the individual values of the breaking load, where applicable, in newtons; l)the arithmetic mean of the flexural strength values; m) the arithmetic mean of the flexural modulus of elasticity values; n)the arithmetic mean of the breaking load values, where applicable; o)detai
46、ls of any deviation from this part of ISO 1209, and of any incident that may have influenced the results; p)the date of the test. Table 2 Results of interlaboratory testing Flexural strength/apparent modulus of elasticity Repeatability limitReproducibility limit ( confidence level)( confidence level
47、) Approximately Approximately Ftxt xt L bd 95 %95 % 5 %15 % Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 05/16/2007 01:48:23 MDTNo reproduction or networking permitted without lice
48、nse from IHS -,-,- ISO 1209-2:2007(E) ICS 83.100 Price based on 5 pages ISO 2007 All rights reservedCopyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 05/16/2007 01:48:23 MDTNo reproduction or networking permitted without license from IHS -,-,-