Research on acoustic emission characteristics of metagabbros with different felsic development under splitting load

IF 1.4 4区物理与天体物理 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

AIP Advances Pub Date : 2024-09-03 DOI:10.1063/5.0226321

Tongzhao Zhang, Zhiqiang Liu, Yongsheng He, Hongguang Ji, Yichao Zhao, Zhaoyang Song

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引用次数: 0

Abstract

The acoustic emission (AE) characteristic signal can reveal the mechanical properties of rock materials and the development characteristics of internal microcracks. Rocks with different mineral development characteristics produce different AE signals during fracture. This study selected variable metagabbros with varying feldspathic development for AE tests under splitting load. The results demonstrated that the characteristics of AE ringing counts during the Brazilian fracture of metagabbro were closely correlated with the content of felsic minerals. The cumulative AE ringing count of metagabbros with feldspar nondevelopment exceeded 250 000, while those of metagabbros with feldspar development did not reach 200 000. As the feldspathic mineral content increases, the AE ringing counts of metagabbro exhibit an increasing trend in the high-energy (1e6–+∞ aJ) and high-amplitude (90–100 dB) intervals. With the development of feldspar minerals, the fracture mode of metagabbro gradually changed from shear failure to tensile failure. The higher the development of felsic minerals, the higher the stress level corresponding to the maximum fractal dimension, the greater the energy released by rock failure, and the more severe the damage. This study is of great significance for revealing the mechanism of rock rupture.

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不同长英质发育的辉长岩在劈裂载荷下的声发射特性研究

声发射（AE）特征信号可以揭示岩石材料的力学性能和内部微裂缝的发育特征。不同矿物发育特征的岩石在断裂时会产生不同的声发射信号。本研究选择了长石发育程度不同的变质辉长岩进行劈裂载荷下的 AE 试验。结果表明，辉长岩在巴西断裂过程中的声发射振铃次数特征与长石矿物的含量密切相关。长石不发育的辉长岩的累积声发射振铃次数超过 250 000 次，而长石发育的辉长岩的累积声发射振铃次数则不超过 200 000 次。随着长石矿物含量的增加，辉长岩的声发射振铃次数在高能量（1e6-+∞ aJ）和高振幅（90-100 dB）区间呈上升趋势。随着长石矿物的发育，辉长岩的断裂模式逐渐由剪切破坏转变为拉伸破坏。长石矿物发育程度越高，最大分形维数对应的应力水平越高，岩石破坏释放的能量越大，破坏程度越严重。这项研究对揭示岩石破裂机理具有重要意义。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

AIP Advances NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

2.80

自引率

6.20%

发文量

1233

审稿时长

2-4 weeks

期刊介绍： AIP Advances is an open access journal publishing in all areas of physical sciences—applied, theoretical, and experimental. All published articles are freely available to read, download, and share. The journal prides itself on the belief that all good science is important and relevant. Our inclusive scope and publication standards make it an essential outlet for scientists in the physical sciences. AIP Advances is a community-based journal, with a fast production cycle. The quick publication process and open-access model allows us to quickly distribute new scientific concepts. Our Editors, assisted by peer review, determine whether a manuscript is technically correct and original. After publication, the readership evaluates whether a manuscript is timely, relevant, or significant.