کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7169129 | 1463040 | 2018 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The influence of temperatures on mixed-mode (IÂ +Â II) and mode-II fracture toughness of sandstone
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موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی مکانیک
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
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.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Engineering Fracture Mechanics - Volume 189, 15 February 2018, Pages 51-63
Journal: Engineering Fracture Mechanics - Volume 189, 15 February 2018, Pages 51-63
نویسندگان
Gan Feng, Yong Kang, Feng Chen, Yi-wei Liu, Xiao-chuan Wang,