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- W2765718348 abstract "To study the fracture toughness of sandstone, this study investigated the influence of temperature on the mixed-mode (I + II) and mode-II fracture toughness of sandstone using semi-circular bend (SCB) specimens. The results showed that temperatures above 500 °C significantly influenced mixed-mode (I + II) and mode-II fracture behavior. A comparison of experimental results with pure mode-I fracture toughness showed that the impact of temperature variations on the mixed-mode (I + II) and mode-II fracture toughness was similar to the impact of temperature variations on pure mode-I fracture toughness. The mixed-mode (I + II) and mode-II fracture toughness of sandstone increased slowly from 20 to 100 °C and decreased slowly from 100 to 500 °C. The mixed-mode (I + II) and mode-II fracture toughness of sandstone decreased sharply from 500 to 600 °C. The effective stress intensity factor of mixed-mode (I + II) at artificial pre-crack angles of 15 °and 30° decreased by 41.02% and 42.55%, respectively. Mode-II fracture toughness decreased by 54.30%. From 500 °C to 600 °C, the change of the sandstone structure is the main reason for the sharp decrease of the mixed-mode (I + II) and mode-II fracture toughness. The threshold temperature range for this sharp decrease is 500–600 °C for the mixed-mode (I + II) and mode-II fracture toughness are identical to pure mode-I fracture toughness." @default.
- W2765718348 created "2017-11-10" @default.
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- W2765718348 date "2018-02-01" @default.
- W2765718348 modified "2023-10-18" @default.
- W2765718348 title "The influence of temperatures on mixed-mode (I + II) and mode-II fracture toughness of sandstone" @default.
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- W2765718348 doi "https://doi.org/10.1016/j.engfracmech.2017.07.007" @default.
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