BS ISO 21971:2019
$142.49
Fine ceramics (advanced ceramics, advanced technical ceramics). Mechanical properties of ceramic composites at ambient temperature in air atmospheric pressure. Determination of hoop tensile properties of tubes
| Published By | Publication Date | Number of Pages |
| BSI | 2019 | 28 |
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).
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | undefined |
| 7 | Foreword |
| 9 | 1 Scope 2 Normative references 3 Terms and definitions |
| 11 | 4 Principle |
| 12 | 5 Apparatus 5.1 Pressurizing system 5.2 Test specimen gripping and end closure |
| 13 | 5.3 Strain measurement 5.3.1 General 5.3.2 Strain gauges 5.3.3 Digital image correlation |
| 14 | 5.4 Pressure and data recording systems 5.5 Measurement of dimensions |
| 15 | 6 Tubular test specimen 6.1 Specimen specifications 6.1.1 General 6.1.2 Dimension 6.1.3 Geometry |
| 16 | 6.1.4 Tolerances and variability 6.2 Specimen preparation 6.2.1 General 6.2.2 As-fabricated |
| 17 | 6.2.3 Application-matched machining 6.2.4 Customary practices 6.2.5 Standard procedure 6.3 Test count and test specimens sampling 7 Test procedure 7.1 General 7.2 Test mode and rates |
| 18 | 7.3 Testing technique 7.3.1 Measurement of test specimen dimensions 7.3.2 Instrumentation of test specimen 7.3.3 Setting-up of strain measurement means |
| 19 | 7.3.4 Measurements |
| 20 | 7.3.5 Post-test analyses 7.4 Test validity 8 Calculation of results 8.1 Test specimen origin 8.2 Hoop tensile stress and strain |
| 21 | 8.3 Hoop tensile strength and corresponding strain |
| 22 | 8.4 Proportionality ratio or pseudo-elastic modulus in circumferential direction 8.4.1 Stress-strain curves with a linear region 8.4.2 Nonlinear stress-strain curves |
| 23 | 8.5 Poisson’s ratio (optional) 8.6 Statistics 9 Test report 9.1 General 9.2 Testing information |
| 24 | 9.3 Test specimen and material 9.3.1 Tubular test specimen drawing or reference 9.3.2 Description of the test material 9.4 Equipment and test parameters 9.5 Test results |
| 26 | Bibliography |
