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| Study on the influence of prefabricated crack geometry on the three-point bending fracture behavior of granite |
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Received:January 03, 2024
Revised:May 11, 2024
Accepted:May 16, 2024
Published Online:August 05, 2025
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| DOI： |
| KeyWord:Precast crack geometry; three-point bending; fracture behavior; numerical modelin |
| Author | Institution |
| wangyong |
Wuhan Polytechnic University |
| libin |
Wuhan Polytechnic University |
| zhoumengjing |
Wuhan Polytechnic University |
| wuaolin |
Wuhan Polytechnic University |
| huzhigang |
Wuhan Polytechnic University |
| jiangyajun |
Wuhan Polytechnic University |
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| Abstract: |
| A three-point bending test and numerical simulation were carried out to study the influence of the length and inclination of the prefabricated crack on the fracture and acoustic emission characteristics of the marble half-disc specimen with prefab. The results show that the acoustic emission cumulative count of marble increase with the increase of prefabricated crack length. When the precast cracks are shorter, more microcracks occur in the rock and the effective length increases. When the prefabricated crack is longer, the fracture length decreases until the peak load is low, and finally the fracture toughness and damage degree increase first and then decrease. With the increase of the inclination angle of the prefabricated crack, the marble transforms from type I fracture to type I-II mixed fracture, and the peak load, damage degree and acoustic emission cumulative count of the marble decrease gradually. |
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