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Methods of testing plastics. Glass reinforced plastics -- Determination of flexural properties. Three point method
This European Standard describes a method for the determination of flexural properties of textile glass reinforced plastics in the form of rectangular bars of standard or non-standard dimensions, moulded directly or cut from sheets or other moulded shapes. It only applies to simple, freely supported beams, loaded at mid-span (three point loading test)1).
The following properties may be determined using the method described:
NOTE If the conventional deflection is exceeded it may not be possible to make direct comparison of results of flexural stress on test specimens of different thicknesses.
NOTE The modulus of elasticity in flexure is to be considered only as an approximate value of Young’s modulus of elasticity.
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