Issue 57

C. Lupi et al., Frattura ed Integrità Strutturale, 57 (2021) 246-258; DOI: 10.3221/IGF-ESIS.57.18

Figure 13: Bending Test @z2 - sampling rate: 100 Hz. a) SC1 and b) SC2.

Figure 14: Bending Test @z3 - sampling rate: 100 Hz. a) SC1 and b) SC2.

z1 (30 mm)

z2 (120 mm)

z3 (240 mm)

Applied Load [kg]

0.50

1.00

2.00

0.50

1.00

2.00

0.50

1.00

2.00

M f (z) [Nmm]

2650.00

5300.00 10600.00

2150.00 4300.00 8600.00

550.00

1100.00 2200.00

σ (z) [MPa]

5.21

10.42

20.84

4.23

8.45

16.91

1.08

2.16

4.32

λ 0 [nm]

1554.855 1554.851 1554.845 1554.977 1554.957 1554.958 1555.126 1555.116 1555.105

λ Load [nm] Δλ [nm] ε [µm/m]

1554.859 1554.857 1554.859 1554.982 1554.977 1554.971 1555.128

1555.12 1555.111

0.004 43.41

0.006 86.83

0.013 173.65

0.005 35.22

0.019

0.013

0.001

0.003 18.02

0.006 36.04

70.44 140.89

9.01 1.00 8.97

ε FBG [µm/m]

2.75

4.22

9.62

2.29

4.12

5.96

2.40 7.51

4.15 8.69

ε / ε FBG [%]

15.81

20.57

18.05

15.37

17.10

23.62

Table 3: Bending Test Results on SC1.

z1 (30 mm)

z2 (120 mm)

z3 (240 mm)

Applied Load [kg]

0.50

1.00

2.00

0.50

1.00

2.00

0.50

1.00

2.00

M f (z) [Nmm]

2600.00

5200.00 10400.00

1700.00 3400.00 6800.00

500.00

1000.00 2000.00

σ (z) [MPa]

5.11

10.22

20.45

3.34

6.68

13.37

0.98

1.97

3.93

λ 0 [nm]

1561.343 1561.343 1561.343 1561.314 1561.314 1561.314 1560.977 1560.977 1560.977

λ Load [nm] Δλ [nm] ε [µm/m]

1561.395 1561.441 1561.528 1561.362 1561.402 1561.471 1560.989

1561 1561.021

0.052 42.59 37.34

0.098 85.19 70.44

0.185

0.048 27.85 34.50

0.088

0.157

0.012

0.023 16.38 16.55

0.044 32.76 31.73

170.38 133.03

55.70 111.40 63.51 113.30

8.19 8.94 0.92

ε FBG [µm/m]

ε / ε FBG [%]

1.14

1.21

1.28

0.81

0.88

0.98

0.99

1.03

Table 4: Bending Test Results on SC2.

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