BS ISO 20337:2018,Fibre-reinforced plastic composites — Shear test method using a shear frame for the determination of the in-plane shear stress/shear strain response and shear modulus.
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BS ISO 20337:2018 is suitable for determining shear properties in both the linear and nonlinear load-deformation range even at shear strains greater than 5 %.
BS ISO 20337:2018 described in this document uses a shear frame fixture in order to introduce a pure shear loading throughout the free area of the test specimens. The edges of the test specimens are uniformly clamped during the test procedure avoiding fibre rotation and load re-distribution effects.This allows for the ultimate shear strength of high shear-elongation materials to be obtained even at shear strains higher than 5 %which is a limitation when using ISO 14129 or other standards regardingin-plane shear test methods for fibre reinforced plastic composites.
BS ISO 20337:2018 pdf can be downloaded.Are you satisfied with the standard?