prEN ISO 20323

This document specifies the conditions for the determination of tensile properties of ceramic matrix composite tubes with continuous fiber-reinforcement at ambient temperature in air atmospheric pressure. This document is specific to the tubular geometries since fiber architecture and specimen geometry factors are distinctly different in composite tubes, as compared to flat specimens. This document provides information on the uniaxial tensile properties and tensile stress-strain response such as tensile strength and strain, tensile elastic modulus and Poisson’s ratio. The information may be used for material development, control of manufacturing (quality insurance), material comparison, characterization, reliability and design data generation for tubular components. This document addresses, but is not restricted to, various suggested test piece fabrication methods. It applies primarily to ceramic and/or glass matrix composite tubes with a continuous fibrous-reinforcement: unidirectional (1D filament winding and tape lay-up), bi-directional (2D braid and weave) and tri-directional (xD, with 2 < x < 3), loaded along the tube axis. Values expressed in this International Standard are in accordance with the International System of Units (SI). NOTE In most cases, ceramic matrix composites to be used at high temperature in air are coated with an antioxidation coating.