NF EN ISO 527-4, T51-034-4 (04/2023)

This document specifies test conditions for the determination of the tensile properties of isotropic and orthotropic fiber-reinforced plastic composites, based on the general principles established in ISO 527-1. NOTE 1 Unidirectional reinforced materials are covered in ISO 527-5. The methods are used to study the tensile behavior of specimens and to determine the tensile strength, tensile modulus of elasticity, Poisson's ratios and other aspects of the tensile stress/strain relationship under the defined conditions. The test method is suitable for the following materials: — fiber-reinforced thermosetting and thermoplastic composites, containing non-unidirectional reinforcements such as mats, fabrics (core yarns or rovings), cut base yarns, combinations of such reinforcements , hybrids, rovings, short and crushed fibers or prepregs; NOTE 2 Injection molded specimens are covered by ISO 527-2. — the above combinations of materials with unidirectional reinforcement, and multidirectional reinforced materials made with unidirectional layers, provided that these laminates are symmetrical; NOTE 3 Materials with perfectly or predominantly unidirectional reinforcement are covered by ISO 527-5. — finished products manufactured with the materials mentioned above. Affected reinforcing fibers include glass fibers, carbon fibers, aramid fibers and other similar fibers.
(Automatic translation from French)