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

0.032

0.032

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

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

60

65

70

35

40

45

Sand content (%)

Barite content (%)

0.032

0.035 0.045 Fracture toughness ( MPa·m 1/2 ) 0.040

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

0.030

0.026

1.0

1.5

2.0

2.5

0.0

0.5

1.0

1.5

2.0

Content of epoxide resin and polyamide (%)

Content of silicone rubber (%)

0.038

0.035 0.045 Fracture toughness (MPa·m 1/2 ) 0.040

0.036

0.030 Fracture toughness (MPa·m 1/2 ) 0.032 0.034

0.030

0.028

0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8

0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7

Rosin content (without silicone rubber) (%)

Rosin content (adding silicone rubber) (%)

Figure 9: Relationships between raw materials contents and fracture toughness of ductile rock-like materials.

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