Jemná keramika (speciální keramika, speciální technická keramika) - Mechanické vlastnosti keramických kompozitů při vysoké teplotě - Stanovení axiálních tahových vlastností trubek (Norma k přímému použití jako ČSN).
NORMA vydána dne 1.12.2025
Designation standards: ČSN EN ISO 4255
Classification mark: 727587
Catalog number: 522373
Publication date standards: 1.12.2025
Approximate weight : 144 g (0.32 lbs)
Country: Czech technical standard
Kategorie: Technické normy ČSN
This document specifies the conditions for determination of the axial tensile properties of ceramic matrix composite (CMC) tubes with continuous fibre-reinforcement at elevated temperature in air, vacuum and inert gas atmospheres. The applicability of this document is specific to tubular geometries because fibre architecture and specimen geometry factors in composite tubes are distinctly different from those in flat specimens.
This document provides information on the axial tensile properties and stress-strain response
in temperature, such as axial tensile strength, axial 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. This document is primarily applicable to ceramic matrix composite tubes with a continuous fibrous reinforcement: unidirectional (1D, filament winding and tape lay-up), bi-directional (2D, braid and weave) and multi-directional (xD, with x > 2), tested along the tube axis