ISO 19587:2021

INTERNATIONAL ISO
STANDARD 19587
First edition
2021-01
Fine ceramics (advanced ceramics,
advanced technical ceramics) —
Mechanical properties of ceramic
composites at elevated temperature
in air atmospheric pressure —
Determination of in-plane shear
strength
Céramiques techniques (céramiques avancées, céramiques techniques
avancées) — Propriétés mécaniques des composites céramiques
à température élevée sous air à pression atmosphérique —
Détermination de la résistance au cisaillement dans le plan
Reference number
©
ISO 2021
© ISO 2021
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ii © ISO 2021 – All rights reserved

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Significance and use . 5
5.1 Test environment . 5
5.2 Material orientation . 6
5.3 Preparation of test pieces . 6
5.4 Failures outside gauge section . 6
5.5 Thin test pieces . 6
6 Apparatus . 6
6.1 Test machine . 6
6.2 Loading devices . 6
6.3 Test fixture . 6
6.4 Heating apparatus . 7
6.5 Temperature measurement . 7
6.6 Data recording system . 7
6.7 Dimension-measuring devices . 7
7 Test pieces . 7
7.1 Test piece geometry . 7
7.2 Test piece preparations . 8
7.3 Number of specimen tests . 8
8 Test conditions . 8
8.1 Test modes and rates . 8
8.1.1 General. 8
8.1.2 Displacement rate . 8
8.1.3 Load rate . 8
8.2 Test temperature . 8
9 Procedures . 9
9.1 Test piece dimensions . 9
9.2 Test preparation . 9
9.3 Test implementation . 9
9.3.1 Mounting of test piece on test fixture . 9
9.3.2 Heating of test piece . . 9
9.3.3 Loadings .10
9.4 Completion of testing .10
9.5 Test validity .11
10 Calculation of results .11
10.1 Shear strength .11
10.2 Error calculation .11
11 Test report .12
Annex A (informative) .13
Bibliography .16
Foreword
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This document was prepared by Technical Committee ISO/TC 206, Fine ceramics.
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iv © ISO 2021 – All rights reserved

INTERNATIONAL STANDARD ISO 19587:2021(E)
Fine ceramics (advanced ceramics, advanced technical
ceramics) — Mechanical properties of ceramic composites
at elevated temperature in air atmospheric pressure —
Determination of in-plane shear strength
1 Scope
This document specifies a method for the determination of in-plane shear strength of continuous
fibre-reinforced ceramic composites at elevated temperature in air or inert atmosphere by the
asymmetric four-point bending test on double-edge notched specimens. The shear strength in plane
(1,2) can be evaluated, where direction 1 is that of the greater fraction of reinforcement and direction
2 is perpendicular to direction 1. Methods for test piece fabrication, testing modes and rates (load or
displacement rate), data collection and reporting procedures are addressed.
This document applies to all ceramic matrix composites with continuous fibre-reinforcement:
unidirectional (1D), bidirectional (2D) and tridirectional (xD, with 2 < x ≤ 3).
This document is for material development, material comparison, quality assurance, characterization,
reliability and design data generation.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 3611, Geometrical product specifications (GPS) — Dimensional measuring equipment: Micrometers for
external measurements — Design and metrological characteristics
ISO 7500-1, Metallic materials — Calibration and verification of static uniaxial testing machines — Part 1:
Tension/compression testing machines — Calibration and verification of the force-measuring system
ISO 19634, Fine ceramics (advanced ceramics, advanced technical ceramics) — Ceramic composites —
Notations and symbols
ISO 20507, Fine ceramics (advanced ceramics, advanced technical ceramics) — Vocabulary
IEC 60584-1, Thermocouples — Part 1: Reference tables
IEC 60584-2, Thermocouples — Part 2: Tolerances
3 Terms and definitions
For the purposes of this document, the
...