BS EN 6035:2015 pdf free.Aerospace series — Fibre reinforced plastics — Test method — Determination of notched and unnotched tensile strength.
BS EN 6035 The specimens are cut out from laminates. The coefficient of variation in the thickness measurements shall be smaller than 2 % per laminate The laminates shall be produced according to EN 2565 for carbon and EN 2374 for glass. Special precautions have to be taken to ensure that no delamination occurs during machining especially for the drilling of the notched specimens.
The laminate should be inspected for example by C-Scan to establish that the laminate is worth testing. lithe NDT reveals unacceptable defects, limits defined in the specification invoking the test, the laminate should not be tested.
The process parameters shall be in line with the specification invoking the test.
The tests may be performed without the specimen being tabbed. However, if tabs are used they shall be strain compatible with the composite being tested either, by using precured tabs of two plies of fabric, lay-up + and — 45°, or by co-bonding using a suitable prepreg system. The precured tabs shall be bonded on both specimens faces with a suitable adhesive system.
Care should be taken that the adhesive bonding temperature does not add any undesired post cure effect to the laminate.
Number of specimens
Five specimens shall be tested per test condition, except when otherwise specified in the technical specification.
Ii tests are carried out after ageing or at a temperature different from room temperature, care should be taken to assure that room temperature/dry reference specimens, which had been machined from the same plate as the specimens under investigation are also tested.
In case of tests after immersion, the conditions shall be according to EN 2489. For tests after exposure
to humid atmosphere, the conditioning shall be in accordance with EN 2823.
The storage and testing of as received specimens shall be carried out at (23 ± 2) °C. (50 ± 5) % relative humidity in accordance with EN 2743. Aged specimens shall be tested within a maximum of 8 h after removal from the exposure environment.BS EN 6035 pdf download.