Level

Temp. (˚C)

Stress Crack Categories

SCI

Undamaged (%)

Single (%)

Double (%)

Multiple (%)

Level 1

44.4 ± 4.6

90

5

4

1

22

Level 2

45.4 ± 5.0

90

4

5

1

24

Level 3

49.8 ± 5.6

68

18

9

5

70

Level 4

52.8 ± 5.4

38

26

23

13

160

Open Sun

35.99 ± 3.2

94

2

4

0

14