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NEN-ISO 19927 specifies a procedure for determining the interlaminar strength, and modulus, by double beam shear (DBS) tests of fibre-reinforced plastic composites. The method is suitable for use with glass or carbon fibre-reinforced plastic composites with thermoset matrices, providing an acceptable interlaminar failure is obtained. This document only applies to laminate with a symmetrical and balanced lay-up as it avoids bending/twisting or bending/extension coupling deformations (see 6.2). The preferred lay-up is unidirectional, with fibres aligned along the specimen (axial) length. The suitability of the test for specific lay-ups, matrices and fibres (e.g. natural) are assessed by trial tests to ensure the correct delamination failures are obtained.
||Met vezel versterkte kunststofcomposieten - Bepaling van de interlaminaire sterkte en modulus door middel van de Double Beam Shear (DBS) test
||Fibre-reinforced plastic composites - Determination of interlaminar strength and modulus by double beam shear test