ENV 12788 : 1998

Contents
Foreword
1. Scope
2. Normative references
3. Principle
4. Definitions and symbols
    4.1 test temperature, T
    4.2 maximum flexural force, Fm
    4.3 flexural stress, o
    4.4 flexural strength, oT,m
5. Apparatus
    5.1 Test machine
    5.2 Test jig
    5.3 Test chamber
    5.4 Set-up for heating
    5.5 Temperature measurement
    5.6 Data recording system
    5.7 Micrometers
6. Test specimens
7. Test specimen preparation
    7.1 Machining and preparation
    7.2 Number of test specimens
8. Test procedures
    8.1 Test set-up: Temperature considerations
    8.2 Test set-up: Other considerations
    8.3 Testing technique
    8.4 Test validity
9. Calculation of results
    9.1 Test specimen origin
    9.2 Flexural strength
10. Test report

Gives the conditions to determine the flexural strength of ceramic matrix composite materials with continuous fibre reinforcement under three-point or four-point bending for temperatures up to 2 000 Deg C under vacuum or gas atmosphere which is inert to the material being tested. Applicable to all ceramic matrix composites with a continuous fibre reinforcement unidrectional (1D), bidirectional (2D), and tridirectional (xD), with 2 less than x less than or equal to 3), loaded along one principal axis of reinforcement.