Seminar

Rock fractures at various scales (e.g., crystal planes, microcracks, cleavages, fissures, joints, beddings, and faults) control a number of Earth’s dynamic processes as well as efficiency and safety of geotechnical engineering practices. A comprehensive study on the initiation and propagation of fractures is of profound scientific and practical significance. A thorough study of the microcracking behavior of rocks leads to a better understanding and prediction of the associated macroscopic cracking process. Although the characteristics of the fracture process zones caused by microcracking in granite under static mode I loading have been extensively investigated experimentally, the microcracking mechanisms of different granites under static mode I and mixed-mode I-II loading conditions are still not clearly understood and merit further study. To advance the understanding of the microcracking mechanisms, this study aims to experimentally study the effects of three factors, namely the notch shape in mode I fracturing tests, the mineralogy and textural property of granite, and the loading condition on the microcracking behavior of granite. Based on the semi-circular bending test, the microcracking processes and associated fracture process zone features of Hong Kong granite are investigated using the acoustic emission and microscopic observation techniques.

https://hku.zoom.us/j/94537178159?pwd=Q3YvVWliUHlmcTJFM2JNdXhZRjVpdz09
(Meeting ID: 945 3717 8159 )

Please contact : GUO Tianyang guoty@connect.hku.hk for zoom password