prEN ISO 4255

Fine ceramics (advanced ceramics, advanced technical ceramics) - Mechanical properties of ceramic composites at high temperature - Determination of uniaxial tensile properties of tubes (ISO/DIS 4255:2024)

This document specifies the conditions for the determination of uniaxial tensile properties of ceramic matrix composite (CMC) tubes with continuous fibre-reinforcement at elevated temperature in air, vacuum or inert gas atmospheres. This document is specific to the 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. It applies primarily to all ceramic matrix composite tubes with a continuous fibrous-reinforcement: unidirectional (1D, filament winding and tape lay-up), bidirectional (2D braid and weave) and multi-directional (xD, with x > 2), tested along the tube axis.

Hochleistungskeramik - Mechanische Eigenschaften von keramischen Verbundwerkstoffen bei hoher Temperatur - Bestimmung der uniaxialen Zugeigenschaften von Rohren (ISO/DIS 4255:2024)

Céramiques techniques - Propriétés mécaniques des composites céramiques à haute température - Détermination des propriétés en traction axiale de tubes (ISO/DIS 4255:2024)

Fina keramika (sodobna keramika, sodobna tehnična keramika) - Mehanske lastnosti keramičnih kompozitov pri visoki temperaturi - Ugotavljanje enoosnih nateznih lastnosti cevi (ISO/DIS 4255:2024)

General Information

• Status: Not Published
• Publication Date: 10-May-2026
• ICS: 81.060.30 - Advanced ceramics
• Technical Committee: CEN/TC 184 - Advanced technical ceramics
• Drafting Committee: CEN/TC 184/SC 1 - Ceramic composites
• Current Stage: 4020 - Submission to enquiry - Enquiry
• Start Date: 17-Oct-2024
• Due Date: 12-Jan-2025
• Completion Date: 17-Oct-2024
• Ref Project: oSIST prEN ISO 4255:2024 - Fine ceramics (advanced ceramics, advanced technical ceramics) - Mechanical properties of ceramic composites at high temperature - Determination of uniaxial tensile properties of tubes (ISO/DIS 4255:2024)

Standards Content (Sample)

SLOVENSKI STANDARD
01-december-2024
Fina keramika (sodobna keramika, sodobna tehnična keramika) - Mehanske
lastnosti keramičnih kompozitov pri visoki temperaturi - Ugotavljanje enoosnih
nateznih lastnosti cevi (ISO/DIS 4255:2024)
Fine ceramics (advanced ceramics, advanced technical ceramics) - Mechanical
properties of ceramic composites at high temperature - Determination of uniaxial tensile
properties of tubes (ISO/DIS 4255:2024)
Hochleistungskeramik - Mechanische Eigenschaften von keramischen
Verbundwerkstoffen bei hoher Temperatur - Bestimmung der uniaxialen
Zugeigenschaften von Rohren (ISO/DIS 4255:2024)
Céramiques techniques - Propriétés mécaniques des composites céramiques à haute
température - Détermination des propriétés en traction axiale de tubes (ISO/DIS
4255:2024)
Ta slovenski standard je istoveten z: prEN ISO 4255
ICS:
81.060.30 Sodobna keramika Advanced ceramics
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
International
Standard
ISO/DIS 4255
ISO/TC 206
Fine ceramics (advanced ceramics,
Secretariat: JISC
advanced technical ceramics) —
Voting begins on:
Mechanical properties of ceramic
2024-10-14
composites at high temperature —
Voting terminates on:
Determination of uniaxial tensile
2025-01-06
properties of tubes
ICS: 81.060.30
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Reference number
ISO/DIS 4255:2024(en)
DRAFT
ISO/DIS 4255:2024(en)
International
Standard
ISO/DIS 4255
ISO/TC 206
Fine ceramics (advanced ceramics,
Secretariat: JISC
advanced technical ceramics) —
Voting begins on:
Mechanical properties of ceramic
composites at high temperature —
Voting terminates on:
Determination of uniaxial tensile
properties of tubes
ICS: 81.060.30
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2024
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
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BE CONSIDERED IN THE LIGHT OF THEIR
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Published in Switzerland Reference number
ISO/DIS 4255:2024(en)
ii
ISO/DIS 4255:2024(en)
Contents Page
Foreword .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Principle . 4
5 Apparatus . 5
5.1 Testing machine . .5
5.2 Gripping system . .5
5.2.1 Test specimen gripping.5
5.2.2 Location and temperature of grips .5
5.2.3 Load train couplers .6
5.3 Test chamber and heating set-up .6
5.4 Heating apparatus .7
5.5 Strain measurement .7
5.5.1 General .7
5.5.2 Extensometers.7
5.5.3 Digital image correlation .8
5.6 Temperature measurement devices .8
5.7 Data recording system .8
5.8 Dimension-measuring devices .9
6 Tubular test specimen . 9
6.1 Specimen specifications .9
6.1.1 General .9
6.1.2 Dimension .9
6.1.3 Geometry commonly used .9
6.1.4 Tolerances and variability .11
6.2 Specimen preparation .11
6.2.1 General .11
6.2.2 As-fabricated .11
6.2.3 Application-matched machining .11
6.2.4 Customary practices . 12
6.2.5 Standard procedure . . . 12
6.3 End collars and alignment issue . 12
6.4 Test count and test specimens sampling .14
7 Test procedure . 14
7.1 Temperature considerations .14
7.1.1 General .14
7.1.2 Controlled temperature zone .14
7.1.3 Temperature measurement . 15
7.2 Test set-up: other considerations . 15
7.3 Testing technique . 15
7.3.1 Measurement of test specimen dimensions . 15
7.3.2 Instrumentation of the test specimen .16
7.3.3 Specimen mounting .16
7.3.4 Setting-up of strain measurement means .16
7.3.5 Setting-up of inert atmosphere .16
7.3.6 Heating of test specimen and temperature control .16
7.3.7 Measurements .17
7.3.8 Post-test analyses .17
7.4 Test validity .17
8 Calculation of results .18
8.1 Test specimen origin .18

iii
ISO/DIS 4255:2024(en)
8.2 Engineering axial tensile stress and strain
...