Issue56

H. Bai et alii, Frattura ed Integrità Strutturale, 56 (2021) 16-45; DOI: 10.3221/IGF-ESIS.56.02

0.034

0.034

0.028 Fracture toughness(MPa·m 1/2 ) 0.030 0.032

0.028 Fracture toughness(MPa·m 1/2 ) 0.030 0.032

0.026

0.026

45

50

55

60

65

45

50

55

60

65

Sand content (%)

Barite content (%)

0.042

0.034 0.038 Fracture toughness(MPa·m 1/2 ) 0.036

0.034 Fracture toughness(MPa·m 1/2 ) 0.036 0.038 0.040

0.032

0.032

0.0

0.5

1.0

1.5

1.0

1.5

2.0

2.5

Epoxide resin-polyamide content (%)

Rosin content (%)

0.034

0.026 Fracture toughness(MPa·m 1/2 ) 0.028 0.030 0.032

0.0

0.5

1.0

1.5

Content of silicone rubber (%)

Figure 14: Relationships between raw materials contents and fracture toughness of brittle rock-like materials.

34