具有梯队节理的辉长岩岩石动力学行为研究

IF 3.4 3区 工程技术 Q3 ENERGY & FUELS
Lei Xue, Shihao Yuan, Kangqi Liu, Longfei Li, Kun Huang, Zhuan Li
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引用次数: 0

摘要

为了揭示动载荷对节理岩体动态损伤行为的影响,采用劈裂式霍普金森压杆(SHPB)系统对节理角为15°、30°、45°、65°和75°的板状辉长岩试样在0.1 MPa的冲击压力下进行了试验。研究发现节理角度对梯队辉长岩的动态特征和断裂行为有显著影响。节理角为15°时所需断裂能最少,最容易破裂;节理角为30°时所需断裂能最多,较难破裂。同时,节理角控制了试件的损伤模式。节理角为15°和30°的试件属于I型裂纹合并,主裂纹为剪切裂纹,且接近直线。节理角为45°和60°的试样属于II型裂纹合并,其中主裂纹为剪切裂纹,并发育少量拉伸次裂纹。节理角为75°的试件属于裂纹合并III型,主要裂纹为剪切裂纹,同时发育大量的拉伸裂纹。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Investigating the Dynamic Behavior of Gabbro Specimens With Echelon Joints

Investigating the Dynamic Behavior of Gabbro Specimens With Echelon Joints

To reveal the influence of dynamic load on the dynamic damage behavior of jointed rock masses, split Hopkinson pressure bar (SHPB) system was employed to test platy gabbro samples with joint angles of 15°, 30°, 45°, 65°, and 75° at an impact pressure of 0.1 MPa. It was found that the joint angle has a significant effect on the dynamic characteristics and fracture behaviors of the echelon gabbro samples. Samples with a joint angle of 15° required the least amount of fracture energy and was most prone to failure, while samples with a joint angle of 30° required the most amount of fracture energy and was difficult to fracture. Moreover, the joint angle controlled the damage mode of the specimen. Specimens with 15° and 30° joint angles corresponded to crack coalescence type I, where the main crack was a shear crack and was nearly straight. Specimens with 45° and 60° joint angles corresponded to crack coalescence type II, where the main crack was a shear crack, and a small number of tensile secondary cracks developed. Specimens with a joint angle of 75° corresponded to crack coalescence type III, where the main crack was a shear crack and a large number of tensile cracks developed.

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来源期刊
Energy Science & Engineering
Energy Science & Engineering Engineering-Safety, Risk, Reliability and Quality
CiteScore
6.80
自引率
7.90%
发文量
298
审稿时长
11 weeks
期刊介绍: Energy Science & Engineering is a peer reviewed, open access journal dedicated to fundamental and applied research on energy and supply and use. Published as a co-operative venture of Wiley and SCI (Society of Chemical Industry), the journal offers authors a fast route to publication and the ability to share their research with the widest possible audience of scientists, professionals and other interested people across the globe. Securing an affordable and low carbon energy supply is a critical challenge of the 21st century and the solutions will require collaboration between scientists and engineers worldwide. This new journal aims to facilitate collaboration and spark innovation in energy research and development. Due to the importance of this topic to society and economic development the journal will give priority to quality research papers that are accessible to a broad readership and discuss sustainable, state-of-the art approaches to shaping the future of energy. This multidisciplinary journal will appeal to all researchers and professionals working in any area of energy in academia, industry or government, including scientists, engineers, consultants, policy-makers, government officials, economists and corporate organisations.
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