Dynamic Mechanical Response and Fracture Properties of Rock-Like Materials with Parallel and Intersecting Flaws.
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| Title: | Dynamic Mechanical Response and Fracture Properties of Rock-Like Materials with Parallel and Intersecting Flaws. |
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| Authors: | Su, Qingqing1,2 (AUTHOR) qqsuhn@126.com, Yang, Fulian1,2 (AUTHOR) |
| Source: | Arabian Journal for Science & Engineering (Springer Science & Business Media B.V. ). Jun2025, Vol. 50 Issue 11, p7879-7893. 15p. |
| Subjects: | Digital image correlation, Methods engineering, Failure mode & effects analysis, Rock properties, Crack propagation |
| Abstract: | Rock masses that undergo a long and complex geological tectonic process contain widely distributed parallel and intersecting flaws. These two types of flaws have different inclinations with the rock layer, resulting in a significant deterioration of the mechanical properties of the rock mass and complex fracture evolution characteristics. However, the effects of flaw inclination and the coupling effect between the two types of flaws on the dynamic response characteristics of rock masses are still unclear. In this paper, both qualitative and quantitative analysis methods are adopted to systematically analyze the influence of flaw inclination on the dynamic properties and fracture evolution mechanisms of rock masses containing both parallel and intersecting flaws via a modified split Hopkinson pressure bar (SHPB) apparatus, a high-speed camera, and digital image correlation (DIC) technology. The test results show that the peak stress and peak strain decrease initially and then increase with increasing flaw inclination from 0° to 90°. The origin of specimen failure and the proportion of energy are dominated by the flaw inclination. Furthermore, flaw tips are prone to strain concentration, which promotes and guides the crack propagation. The major cracks in flawed specimens always occur along flaws, and their failure modes can be classified into three categories: tensile failure along flaws, tensile‒shear composite failure along flaws, and tensile failure perpendicular to flaws. Additionally, fractal feature analyses indicate that the degree of fragmentation of the flawed specimens tends to increase and then decrease as the flaw inclination increases from 0° to 90°. [ABSTRACT FROM AUTHOR] |
| Copyright of Arabian Journal for Science & Engineering (Springer Science & Business Media B.V. ) is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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