PSI - Issue 64

Rebecca Grazzini et al. / Procedia Structural Integrity 64 (2024) 1532–1539 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

1535

4

Fig. 1. Load-fibre displacement of single shear test (a) Sst-L-D; (b) Sst-G-D; (c) Sst-C-D; (d) Sst-L-C; (e) Sst-G-C; (f) Sst-C-C;

Table 2. Results of single-shear tests.

P max [N]

s max [mm]

IF

Group

n

mean 1226 3205 1159 2956 1181 3290

CoV 0.04 0.11 0.13 0.13 0.11 0.01

mean

CoV 0.12

Sst -L-D Sst -L-C Sst -G-D Sst -G-C Sst -C-D Sst -C-C

3 3 3 3 3 3

0.36

0.63 1.09 0.59 1.00 0.66 1.12

-

-

0.61

0.30

-

-

0.4

0.33

-

-

3. CML calibration and load slip estimation For the back calibration of the CML, the load versus secant stiffness, k sec , diagram is plotted, where each value k i, sec = P i /s i depends on the i-th recorded value of load, P i , and slip, s i . Then, a moving average is evaluated along an appropriate record length depending on the acquisition parameters. The diagram recalls that reported in Figure 2.