ABSTRACT
Table 77.1 shows the breaking strengths (GPa) of 137 carbon fibers [1]. The fibers tension tested in air had an approximate diameter of 7.8 microns and a length of 5 mm. The expectation was that the data would conform to Weibull statistics, as there were good theoretical reasons and experimental data for using the Weibull model to describe the strengths of brittle materials [1–3]. It appears that the reported breaking strengths [1] were for fibers that were “bare,” having been stripped of a potentially protective resin coating [3]. The role of the resin coating has been discussed (Chapter 36). Breaking Strengths (GPa) for 137 Carbon Fibers
2.65
3.28
3.55
3.73
3.98
4.17
4.42
4.60
5.09
2.73
3.28
3.60
3.73
3.98
4.17
4.43
4.60
5.10
2.94
3.29
3.62
3.75
4.01
4.18
4.44
4.64
5.15
3.01
3.30
3.63
3.77
4.01
4.19
4.47
4.65
5.16
3.02
3.30
3.64
3.80
4.04
4.20
4.47
4.70
5.16
3.03
3.33
3.68
3.80
4.04
4.20
4.48
4.71
5.30
3.05
3.35
3.68
3.81
4.06
4.23
4.52
4.75
5.60
3.06
3.35
3.69
3.82
4.06
4.26
4.53
4.76
6.20
3.06
3.40
3.69
3.82
4.09
4.30
4.53
4.78
6.41
3.10
3.42
3.69
3.83
4.10
4.31
4.55
4.81
3.15
3.47
3.70
3.85
4.10
4.32
4.57
4.92
3.17
3.48
3.70
3.90
4.11
4.34
4.58
4.93
3.20
3.50
3.70
3.92
4.12
4.35
4.58
4.93
3.21
3.50
3.71
3.92
4.12
4.38
4.58
4.93
3.23
3.53
3.72
3.94
4.16
4.38
4.59
4.94
3.23
3.54
3.72
3.96
4.17
4.38
4.59
5.03
