ISO 20504:2022

Name: ISO 20504:2022 — Fine ceramics (advanced ceramics, advanced technical ceramics) — Mechanical properties of ceramic composites at room temperature — Determination of compressive properties
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Fine ceramics (advanced ceramics, advanced technical ceramics) — Mechanical properties of ceramic composites at room temperature — Determination of compressive properties

Название (английский):

ISO 20504:2022

Fine ceramics (advanced ceramics, advanced technical ceramics) — Mechanical properties of ceramic composites at room temperature — Determination of compressive properties

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 17
Дата публикации:: 1 декабря 2022 г.
Издание:: ISO IS 20504 edition 3 version 1
ICS:: 81.060.30

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Описание (английский):

This document describes procedures for determination of the compressive behaviour of ceramic matrix composite materials with continuous fibre reinforcement at room temperature. This method applies to all ceramic matrix composites with a continuous fibre reinforcement, uni-directional (1D), bi-directional (2D) and tri-directional (xD, with 2 x

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 20504:2022 specifies a standardized method for determining the compressive behaviour of ceramic matrix composites (CMCs) with continuous fibre reinforcement at room temperature. It covers uni‑directional (1D), bi‑directional (2D) and tri‑directional (xD) architectures and also applies to carbon‑fibre‑reinforced carbon (C/C) composites. Two test configurations are described: compression between platens and compression using grips. The standard defines measurement principles, apparatus, specimen preparation, test execution, data analysis and reporting.

Key topics and technical requirements

Scope and principle: Compression testing is performed at a constant cross‑head displacement rate or constant deformation rate; constant force rate only for linear behaviour up to failure. Force and longitudinal deformation are recorded simultaneously.

Apparatus and measurement:

Test machines must have a force measurement system conforming to ISO 7500‑1 (grade 1 or better).
Strain measurement by extensometers (meeting ISO 9513, class 1) or strain gauges; extensometer range linearity and gauge length considerations are specified.
Load train alignment and mitigation of bending/torsion are required; misalignment verification follows ISO 17161.
When using platens, parallelism of platen faces in the loading area is specified (very tight tolerance) and compliant interlayers (paper/cardboard) are allowed for inhomogeneous materials.
For specimens prone to buckling, antibuckling devices (e.g., per ISO 14126 practices) are recommended.

Test specimens and preparation:

Requirements for calibrated length, initial gauge length and cross‑sectional area, machining and surface preparation to avoid local artefacts.
Guidance on number of specimens and mounting techniques (platens vs. grips).

Results and calculations:

Determination of compressive strength, strain at maximum compressive force, proportionality ratio / pseudo‑elastic modulus and elastic modulus where applicable.
Criteria for test validity and reporting requirements.

Practical applications and users

ISO 20504:2022 is intended for:

Materials and mechanical testing laboratories performing routine or qualification compression tests on CMCs.

R&D teams developing advanced ceramics for aerospace, automotive, energy, defense and industrial applications.

Quality control and suppliers requiring consistent, reproducible compressive property data for specifications and acceptance testing.

Standards developers and certification bodies comparing material performance across suppliers and designs.

Using ISO 20504 helps ensure comparable, traceable compressive property data for design allowables, failure analysis, and material selection.

Related standards

ISO 7500‑1 - calibration/verification of force measurement systems

ISO 9513 - calibration of extensometer systems

ISO 17161 - misalignment verification for uniaxial tests

ISO 14126 - guidance on antibuckling devices (practices referenced)

Keywords: ISO 20504:2022, compressive properties, ceramic matrix composites, fine ceramics, compression testing, strain measurement, extensometer, compressive strength, elastic modulus.

ISO 20504:2022

Abstract

Похожие стандарты

ISO 20504:2022

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Practical applications and users

Related standards

Технические детали

ISO 7500-1:2018

Metallic materials — Calibration and verification of static uniaxial testing machines — Part 1: Tension/compr…

ISO 9513:2012

Metallic materials — Calibration of extensometer systems used in uniaxial testing

BS EN ISO 17161:2016

Fine ceramics (advanced ceramics, advanced technical ceramics). Ceramic composites. Determination of the degr…

BS EN ISO 14126:2023

Fibre-reinforced plastic composites. Determination of compressive properties in the in-plane direction.