EN ISO 21971:2024

This document specifies the conditions for the determination of hoop tensile properties of ceramic

matrix composite (CMC) tubes with continuous fibre-reinforcement at ambient temperature in air

atmospheric pressure. This document is specific to the tubular geometries since fibre architecture and

specimen geometry factors in composite tubes are distinctly different from those in flat specimens.

This document provides information on the hoop tensile properties and stress-strain response, such

as hoop tensile strength, hoop tensile strain at failure and elastic constants. The information can 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), subjected to an internal pressure.

Values expressed in this document are in accordance with the International System of Units (SI).