PSI - Issue 43

Martina Šomodíková et al. / Procedia Structural Integrity 43 (2023) 258–263 Author name / Structural Integrity Procedia 00 (2022) 000 – 000

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Table 1. Identified values of selected parameters for specimens with a deep notch tested in 3PBT a WST – comparison of results determined with exponential (left) and bilinear (right) tensile softening model.

Exponential tensile softening model

Bilinear tensile softening model

E (GPa)

f t (MPa) 2.0 – 4.5

G f (J/m 140 – 260 2 )

E (GPa)

f t (MPa) 1.5 – 3.5

c 1,x ×10

– 2 ( – ) c

1,y ×10

– 2 ( – ) c

2,x ×10

– 2 ( – )

f (J/m

2 )

G

min – max

25 – 40 28.63 29.72 28.24 28.49 28.31 32.70 30.53 29.69 32.48 29.00 31.35 29.94 23.58 25.55 21.61 35.07 36.31 34.28 28.70 28.59 28.43

25 – 40 29.38 30.18 29.04 29.31 29.05 32.73 31.87 31.01 32.66 29.64 31.83 30.20 23.99 25.98 22.54 35.76 36.76 35.20 29.32 29.46 29.54

1.5 – 5.5

5.0 – 15.0

9.0 – 15.0

–

4.22 4.47 3.46 2.83 3.69 3.61 3.84 3.48 3.86 2.83 2.60 3.54 2.84 3.48 3.79 3.15 3.36 2.98 2.97 3.13 3.42

169.22 121.82 185.33 160.81 155.56 149.42 140.52 142.00 132.23 187.32 214.86 235.26 209.05 185.38 193.13 246.81 193.90 196.58 199.40 219.45 201.92

3.14 3.02 2,87 2.50 3.04 2.94 3.12 2.99 3.02 2.27 2.12 3.00 2.33 2.83 2.99 2.65 2.83 2.44 2.48 2.55 2.60

2.34 1.88 2.66 2.37 1.86 1.73 1.97 2.29 1.56 2.92 3.16 2.72 3.69 2.71 2.49 3.47 2.29 3.27 2.92 3.58 3.14

2.49 4.49 5.95 7.68 6.94 9.87 8.13 6.44 10.5 7.42 10.2 9.57 6.84 8.36 10.5 11.9 11.2 10.6 10.2 6.03 6.43

8.40 5.01 1.03 13.0 15.0 12.4 12.7 12.4 12.7 15.8 18.3 14.6 10.2 6.47 6.89 12.3 12.8 7.45 13.2 12.2 9.47

159.31 127.06 187.80 168.35 176.27 174.39 187.74 185.23 174.45 185.42 213.06 246.91 204.75 184.12 192.00 261.73 210.86 198.36 211.20 219.84 194.67

B_100_L

W_100_L

B_200_L

W_200_L

B_300_L

W_300_L

B_all_L: Mean (CoV) 31.39 (9.7) 3.40 (18.1) 194.57 (19.0) 32.00 (9.6) 2.70 (13.2) 2.74 (18.8) 8.19 (40.3) 11.4 (22.9) 188.42 (8.4) W_all_L: Mean (CoV) 28.22 (11.6) 3.41 (11.2) 174.07 (17.5) 28.95 (11.2) 2.78 (9.8) 2.53 (27.8) 8.16 (20.9) 11.7 (36.7) 198.95 (20.8) All_L: Mean (CoV) 29.58 (11.8) 3.41 (14.1) 182.86 (18.7) 30.26 (11.4) 2.75 (11.1) 2.62 (23.9) 8.17 (29.9) 11.5 (28.9) 193.50 (15.0)

Fig. 3. Dependence of the identified parameter values on the specimen size: analysis with exponential (black bars) and bilinear (grey bars) tensile softening model. The values in the bars correspond to the mean value and coefficient of variation (in brackets) of values identified for the individual set of experiments.