BS EN 1007-5:2010 Advanced technical ceramics. Ceramic composites. Methods of test for reinforcements. Determination of distribution of tensile strength and of tensile strain to failure of filaments within a multifilament tow at ambient temperature
BS EN 1007-5 specifies the conditions, apparatus and procedure for determining the distribution of tensile strength and tensile strain to failure of ceramic filaments in multifilament tows at ambient temperature.
BS EN 1007-5 applies to tows of continuous ceramic filaments, which are assumed to act freely and independently under loading, and behave linearly elastic up to failure.
Contents of BS EN 1007-5:
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Significance and use
6 Apparatus
6.1 Tensile testing equipment
6.2 Load train
6.3 Data recording
7 Test specimens
7.1 General
7.2 Window type specimen
7.3 Cylindrical end type specimen
8 Test specimen preparation
8.1 General
8.2 Window type specimen
8.3 Cylindrical end type specimen
8.4 Number of test specimens
8.5 Determination of the initial cross sectional area
8.6 Determination of the gauge length
9.1 Test specimen mounting
9.2 Selection of strain rate
9.3 Measurement
9.4 Determination of load train compliance
9.5 Test validity
10 Calculation of results
10.1 Calculation of the parasitic load train compliances
10.2 Determination of true origin
10.3 Construction of envelope curve and determination of instantaneous compliance Ct,j
10.4 Probability of filament rupture
10.5 Distribution of filament strain
10.5.1 Calculation of filament strain
10.5.2 Distribution of filament strain
10.6 Distribution of filament strength
10.6.1 Initial cross sectional area
10.6.2 Elastic modulus (Young’s modulus) of the tow
10.6.3 Calculation of filament strength and filament strength distribution
10.7 Average filament rupture strain and average filament rupture strength
10.8 Overall average filament rupture strain and overall average filament rupture strength
10.9 Calculation of tow strength
11 Test report
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