EN 658-1:1998

Foreword
1 Scope
2 Normative references
3 Principle
4 Definitions and symbols
   4.1 calibrated length, L
   4.2 gauge length, L[o]
   4.3 initial cross section area, A[o]
   4.4 longitudinal deformation, delta L
   4.5 tensile strain, apsilon
   4.6 tensile stress, sigma
   4.7 maximum tensile force, F[t],[m]
   4.8 tensile strength, sigma[t],[m]
   4.9 proportional limit stress, sigma o
   4.10 proportionality ratio or pseudo-elastic
        modulus E[p], elastic modulus, E
   4.11 cumulative damage energy, phi
   4.12 axial strain
   4.13 bending strain
   4.14 percent bending
5 Apparatus
   5.1 Test machine
   5.2 Load train
   5.3 Strain measurement
   5.4 Data recording system
   5.5 Micrometers
6 Test specimens
7 Test specimen preparation
   7.1 Machining and preparation
   7.2 Number of test specimens
8 Test procedure
   8.1 Displacement rate
   8.2 Measurement of test specimen dimensions
   8.3 Testing technique
   8.4 Test validity
9 Calculation of results
   9.1 Test specimen origin
   9.2 Tensile strength
   9.3 Tensile strain at maximum tensile force
   9.4 Proportionality ratio or pseudo-elastic
        modulus elastic modulus
   9.5 Cumulative damage energy
10 Test report

This part of EN 658 specifies the conditions for determination of tensile properties of ceramic matrix composite materials with continuous fibre reinforcement at ambient temperature. This standard applies to all ceramic matrix composites with a continuous fibre reinforcement, unidirectional (1D), bidirectional (2D) and tridirectional (xD, with 2