Dielectric and Electrical Properties of WS₂ Nanotubes/Epoxy Composites and Their Use for Stress Monitoring of Structures

Table 2

Average sensitivity factors, maximum current increase, and the maximum strain (at breaking point), and the samples strength.

Sample type	-test 1, strain range 0.3–0.6 []	-test 2, strain range 0.3–0.6 []	-test 3, strain range 0.3–0.6 []	-test 3, strain range 1.0–1.3 []	Maximum current increase at the breaking point []	Maximum strain []	Strength MPa]
Neat epoxy	—	—	—	—	—	8.6	59.4
Sample 8	0.7 ± 0.1	0.5 ± 0.2	0.7 ± 0.1	2.1 ± 0.3	2.7 ± 0.6	2.0 ± 0.2	38.9 ± 1.9
Sample 9	0.3 ± 0.1	0.3 ± 0.1	0.3 ± 0.1	1.3 ± 0.2	2.0 ± 0.1	1.7 ± 0.4	42.0 ± 0.2
Sample 10	0.4 ± 0.1	0.6 ± 0.5	0.7 ± 0.5	1.2 ± 0.1	2.3 ± 0.6	1.9 ± 0.1	38.5 ± 3.3
Sample 11	0.8 ± 0.7	0.6 ± 0.1	0.7 ± 0.1	1.6 ± 0.1	2.3 ± 0.6	1.7 ± 0.3	37.8 ± 1.0