ENV 13235 : 1998

Foreword
1 Scope
2 Normative references
3 Principle
4 Definitions and symbols
      4.1 creep
      4.2 test temperature, T
      4.3 calibrated length, l
      4.4 gauge length, LO
      4.5 controlled temperature zone
      4.6 initial cross section area, AO
      4.7 applied tensile force
      4.8 applied tensile stress
      4.9 longitudinal deformation, DL
      4.10 tensile creep strain, ecr
      4.11 creep rupture time, tcr,m
      4.12 creep strain rate, ecr
      4.13 creep types
5 Significance and use
6 Apparatus
      6.1 Test installations
      6.2 Load train
      6.3 Test chamber
      6.4 Set-up for heating
      6.5 Extensometer
      6.6 Temperature measurement
      6.7 Data recording system
      6.8 Micrometers
7 Test specimens
8 Test specimen preparation
      8.1 Machining and preparation
      8.2 Number of test specimens
9 Test procedures
      9.1 Test set-up: Temperature considerations
      9.2 Test set-up: loading considerations
      9.3 Test set-up: other considerations
      9.4 Test technique
      9.5 Test validity
10 Calculation of results
      10.1 test specimen origin
      10.2 Results
      10.3 Creep strain rate curve
11 Test report

Gives the conditions for determining the tensile creep deformation and failure behaviour of ceramic matrix composite materials with continous fibre reinforcement for temperatures up to 2 000 degree C under vacuum or in a gas atmosphere which is inert to the material under test. These test conditions prevent changes to the material as a result of chemical reaction with the test environment.