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ISO 527-5-2009 pdf free download
ISO 527-5-2009 pdf free download.Plastics Determination of tensile properties Part 5:Test conditions for unidirectional fibrereinforced plastic composites.
Plastiques — Determination des propriétés en traction — Partie 5: Conditions d’essai pour les composites plastiques renforcés de fibres unidirectionnelles.
6.1.2 Type A specimen (for longitudinal direction)
Type A specimens shall have a width of 15 mm ± 0,5 mm, an overall length of 250 mm and a thickness of 1 mm ± 0,2 mm or. for specimens from filament-wound test plates, a thickness of 2 mm ± 0,2 mm. The sides of each individual specimen shall be parallel to within 0,2 mm.
6.1.3 Type B specimen (for transverse direction)
Type B specimens shall have a width of 25 mm ± 0,5 mm, an overall length of 250 mm and a thickness of 2 mm ± 0,2 mm. The sides of each individual specimen shall be parallel to within 0,2 mm.
For type B specimens taken from filament-wound plates prepared using ISO 1268-5. a test specimen length of 200 mm is acceptable.
6.2 Preparation of specimens
In the case of moulding and lamination materials, prepare a test plate in accordance with the relevant part of
ISO 1268 or another specifiedlagreed procedure. Cut individual specimens, or groups of specimens
(see Annex A), from the test plate.
In the case of finished products (for example, for quality control during manufacture or on delivery), take specimens from flat areas.
Take all specimens with their axis within 0,5° of the mean fibre axis.
Parameters for machining specimens are specified in ISO 2818. Further guidance on cutting out specimens is
given in Annex A.
6.2.2 End tabs
The ends of the specimen shall be reinforced with end tabs, preferably made of cross-ply or fabric glass-fibrelresin laminate with the fibres at ± 45° to the specimen axis. The tab thickness shall be between 0,5 mm and 2 mm, with a tab angle of 90° (i.e. not tapered).
Alternative tabbing arrangements are permissible, but shall be shown, before use, to give at least equal strength and no greater coefficient of variation (see ISO 527-1 :1 993, Subclause 10.5. and ISO 3534-1) than the recommended tabs. Possible alternatives include tabs made from the material under test, mechanically fastened tabs. unbonded tabs made of rough materials (such as emery paper or sandpaper, and the use of roughened grip faces).
If the test is carried out on untabbed specimens, the distance between the grips shall be the same as that between the tabs of tabbed specimens.ISO 527-5-2009 pdf free download.
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