BS EN ISO 527-4:2021

Plastics. Determination of tensile properties. Test conditions for isotropic and orthotropic fibre-reinforced plastic composites | Status: Superseded, Withdrawn

1 Scope This document specifies the test conditions for the determination of the tensile properties of isotropic and orthotropic fibre-reinforced plastic composites, based upon the general principles given in ISO 527‑1.

NOTE 1 Unidirectional reinforced materials are covered by ISO 527‑5.

The methods are used to investigate the tensile behaviour of the test specimens and for determining the tensile strength, tensile modulus, Poisson's ratios and other aspects of the tensile stress-strain relationship under the defined conditions. The test method is suitable for use with the following materials:

• — fibre-reinforced thermosetting and thermoplastic composites incorporating non-unidirectional reinforcements such as mats, woven fabrics, woven rovings, chopped strands, combinations of such reinforcements, hybrids, rovings, short or milled fibres or preimpregnated materials (prepregs);

  NOTE 2 Injection moulded specimens are covered by ISO 527‑2.

• — combinations of the above with unidirectional reinforcements and multidirectional reinforced materials constructed from unidirectional layers, provided such laminates are symmetrical;

  NOTE 3 Materials with completely or mainly unidirectional reinforcements are covered by ISO 527‑5.

• — finished products made from materials mentioned above.

The reinforcement fibres covered include glass fibres, carbon fibres, aramid fibres and other similar fibres.