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http://thuvienso.vanlanguni.edu.vn/handle/Vanlang_TV/18737
Nhan đề: | Cracking and Failure in Rock Specimen Containing Combined Flaw and Hole under Uniaxial Compression |
Tác giả: | Fan, Xiang Chen, Rui Lin, Hang Lai, Hongpeng Zhang, Chunyang |
Từ khoá: | Research Inclination Stress concentration Crack propagation Crack initiation Cracking (fracturing) Flaking Inclination angle Researchers Numerical analysis Jet cutting |
Năm xuất bản: | 2018 |
Nhà xuất bản: | Hindawi Limited |
Tóm tắt: | Flaw is a key factor influencing failure behavior of a fractured specimen. In the present study, rectangular-flawed specimens were prepared using sandstone to investigate the effect of flaw on failure behavior of rock. Open flaw and cylindrical hole were simultaneously precut within rock specimens using high-pressure water jet cutting technology. Five series of specimens including intact, single-hole-alone, two-hole-alone, single-hole and two-flaw, and two-hole and single-flaw blocks were prepared. Uniaxial compressive tests using a rigid servo control instrument were carried out to investigate the fracture processes of these flawed specimens. It is observed that during loading, internal stress always intensively distributed at both sidewalls of open hole, especially at midpoint of sidewalls, so rock crumb flaking was firstly observed among all sandstone specimens containing single hole or two holes. Cracking around open hole is associated with the flaw inclination angle which was observed in Series III and V. Crack easily initiated at the tips of flaw with inclination angles of 0°, 30°, and 60° but hard for 90° in Series III and V. Rock burst was the major failure mode among most tested specimens, which generally induced new cracks and finally created crater shape. Additionally, due to extrusion between blocks, new shear or tensile cracks were generated and the rock specimen surface spalled. Eventually, four typical failure processes including rock crumb flaking, crack initiation and propagation, rock burst, and second rupture, were summarized. |
Mô tả: | "Hindawi Advances in Civil Engineering Volume 2018, Article ID 9818250, 15 pages https://doi.org/10.1155/2018/9818250" |
Định danh: | http://thuvienso.vanlanguni.edu.vn/handle/Vanlang_TV/18737 |
ISSN: | 1687 - 8086 |
Bộ sưu tập: | Bài báo_lưu trữ |
Các tập tin trong tài liệu này:
Tập tin | Mô tả | Kích thước | Định dạng | |
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BBKH1106_TCCN_Cracking and Failure.pdf Giới hạn truy cập | Cracking and Failure in Rock Specimen Containing Combined Flaw and Hole under Uniaxial Compression | 10.32 MB | Adobe PDF | Xem/Tải về Yêu cầu tài liệu |
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