Issue 74
O. Staroverov et alii, Fracture and Structural Integrity, 74 (2025) 358-372; DOI: 10.3221/IGF-ESIS.74.22
50 J or more, a breakthrough of the specimens occurs; with the reinforcement scheme [0/90] n , growth of the lamination area stops, while with the scheme [± 45] n , it continues to increase to E imp = 75 J.
6
6
6
6
6
10 J
15 J
20 J
30 J
35 J
4
4
4
4
4
2
2
2
2
2
Load, kN
Load, kN
Load, kN
Load, kN
Load, kN
0
0
0
0
0
0 2 4 6 8 10
0 5 10 15
0 2 4 6
0 2 4 6
0 2 4 6 8 10
u , mm
u , mm
u , mm
u , mm
u , mm
6
6
6
6
6
50 J
60 J
75 J
40 J
100 J
4
4
4
4
4
2
2
2
2
2
Load, kN
Load, kN
Load, kN
Load, kN
Load, kN
0
0
0
0
0
0 10 20
0 5 10 15
0 10 20
0 10 20
0 10 20
u , mm
u , mm
u , mm
u , mm
u , mm
a
6
6
6
6
6
10 J
15 J
20 J
30 J
35 J
4
4
4
4
4
2
2
2
2
2
Load, kN
Load, kN
Load, kN
Load, kN
Load, kN
0
0
0
0
0
0 2 4 6
0 2 4 6
0 2 4 6 8 10
0 2 4 6 8 10
0 5 10 15
u , mm
u , mm
u , mm
u , mm
u , mm
6
6
6
6
6
40 J
50 J
60 J
75 J
100 J
4
4
4
4
4
2
2
2
2
2
Load, kN
Load, kN
Load, kN
Load, kN
Load, kN
0
0
0
0
0
0 5 10 15
0 10 20 u , mm
0 10 20 u , mm
0 10 20 u , mm
0 10 20 u , mm
u , mm
b
6
6
6
6
6
10 J
15 J
20 J
30 J
35 J
4
4
4
4
4
2
2
2
2
2
Load, kN
Load, kN
Load, kN
Load, kN
Load, kN
0
0
0
0
0
0
5
10
0
5
10
0
5
10
0
5
10
0
5
10
t , ms
t , ms
t , ms
t , ms
t , ms
6
6
6
6
6
40 J
50 J
60 J
75 J
100 J
4
4
4
4
4
2
2
2
2
2
Load, kN
Load, kN
Load, kN
Load, kN
Load, kN
0
0
0
0
0
0
5
10
0
5
10
0
5
10
0
5
10
0
5
10
t , ms
t , ms
t , ms
t , ms
t , ms
c
6
6
6
6
6
10 J
15 J
20 J
30 J
35 J
4
4
4
4
4
2
2
2
2
2
Load, kN
Load, kN
Load, kN
Load, kN
Load, kN
0
0
0
0
0
0
5
10
0
5
10
0
5
10
0
5
10
0
5
10
t , ms
t , ms
t , ms
t , ms
t , ms
6
6
6
6
6
40 J
50 J
60 J
75 J
100 J
4
4
4
4
4
2
2
2
2
2
Load, kN
Load, kN
Load, kN
Load, kN
Load, kN
0
0
0
0
0
0
5
10
0
5
10
0
5
10
0
5
10
0
5
10
t , ms
t , ms
t , ms
t , ms
t , ms
d Figure 2: The dependences of load on displacement and load on time for specimens with reinforcement schemes [0/90] n (a, c) and [±45] n (b, d), respectively
362
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