BS EN ISO 14126:1999:2003 Edition
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Fibre-reinforced plastic composites. Determination of compressive properties in the in-plane direction
| Published By | Publication Date | Number of Pages |
| BSI | 2003 | 30 |
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 1 | BRITISH STANDARD |
| 2 | National foreword |
| 4 | Foreword |
| 9 | Introduction |
| 11 | 1 Scope 1.1 This International Standard specifies two methods for determining compressive properties, in … 1.2 The compressive properties are of interest for specifications and quality-control purposes. 1.3 Two loading methods and two types of specimen are described. They are: 1.4 The methods are suitable for fibre-reinforced thermoplastic and thermosetting plastic composi… 1.5 The methods are performed using specimens which may be machined from a test panel made in acc… 1.6 The methods specify required dimensions for the specimen. Tests which are carried out on spec… 1.7 Fibre-reinforced plastics are usually anisotropic. It is therefore often useful to cut test s… 2 Normative references |
| 12 | 3 Definitions 3.1 compressive stress 3.2 compressive strength compressive failure stress 3.3 compressive strain 3.4 compressive failure strain 3.5 modulus of elasticity in compression chord modulus 3.6 specimen coordinate axes |
| 13 | 4 Principle 5 Apparatus 5.1 Test machine 5.2 Strain measurement 5.3 Micrometer 5.4 Loading fixtures |
| 14 | 6 Test specimens 6.1 Shape and dimensions Table 1 – Specimen dimensions 6.2 Preparation |
| 15 | 6.3 Checking 7 Number of test specimens 7.1 At least five test specimens shall be tested in each direction of test. The number of measure… 7.2 The results from test specimens that rupture inside the grip end blocks or end tabs shall be … 8 Conditioning 9 Procedure 9.1 Conduct the test in the atmosphere specified in the International Standard for the material t… 9.2 Measure the width 9.3 Attach strain gauges, or extensometers, and set up the necessary strain-recording equipment. … |
| 16 | 9.4 Mount the specimen in the compression fixture. 9.5 Set the cross-head speed to�1�mm/min ±0,5�mm/min and load the specimen to failure. 9.6 Record the load and the strain (or deformation) continuously, if possible, or at least record… 9.7 Record the maximum load sustained by the specimen during the test. 9.8 Check that the test was valid (see 9.9 Record the mode of failure (see 10 Expression of results 10.1 Calculate the compressive strength ÷ 10.2 Calculate the compressive modulus 10.3 Calculate the compressive failure strain º 10.4 Calculate the arithmetic mean of the test results and, if required, the standard deviation a… |
| 17 | 11 Precision 12 Test report Figure 1 – Unidirectionally reinforced composite plate element showing symmetry axes |
| 18 | Figure 2 – Schematic diagram of compression test specimen and fixture for method 1 |
| 19 | Figure 3 – Schematic diagram of compression test fixture for method 2 Figure 4 – Type A and B tabbed-specimen designs |
| 20 | Figure 5 – Compressive stress/strain diagram Figure 6 – Acceptable modes of failure |
| 21 | Annex A (normative) Specimen preparation A.1 Machining the specimens A.2 Preparation of specimens with bonded end tabs |
| 22 | Figure A.1 – Tabbed panel for specimen preparation |
| 23 | Annex B (informative) Compression fixtures for method 1 Figure B.1 – ASTM D 3410/A (Celanese) test fixture Figure B.2 – ASTM D 3410/B (ITTRI) test fixture |
| 24 | Annex C (informative) Compression fixtures for method 2 Figure C.1 – ISO 8515 end-loading fixture |
| 25 | Figure C.2 – ASTM D 695 (modified) type from prEN 2850 |
| 26 | Annex D (informative) Euler buckling criteria |
| 27 | Annex ZA (normative) Normative references to international publications with their relevant European publi… |
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