Constitutive model of water-saturated marble under coupling effects of uniaxial impact compressive loading and low-temperature

IF 0.9 4区地球科学 Q4 GEOCHEMISTRY & GEOPHYSICS

Acta Geodynamica et Geomaterialia Pub Date : 2020-03-05 DOI:10.13168/agg.2020.0011

Junzhe Li

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引用次数: 2

Abstract

The study of the mechanical properties of frozen rock is a basic problem that humans have to face in artificial low-temperature rock engineering and cold region rock engineering. There are few literatures on the dynamic constitutive models of frozen rocks under low-temperature gradients at home and abroad. In this paper, the constitutive model of water-saturated marble under the coupling effects of uniaxial impact compressive load and low-temperature is studied by theoretical analysis and experimental verification. Based on the theory of mechanical element combination, a rock constitutive model considering strain rate effect, damage softening effect and low-temperature effect is established, and the model parameters are determined by fitting method. The dynamic stress-strain curve of water-saturated marble at -30 °C is predicted. The predicted results are in good agreement with the experimental results and the concordance correlation coefficient is 0.984092. The relevant results of this paper can provide a theoretical reference for the excavation and protection of rock engineering under negative temperature. ARTICLE INFO Article history: Received 30 November 2019 Accepted 5 February 2020 Available online 5 March 2020

查看原文本刊更多论文

单轴冲击压缩载荷与低温耦合作用下饱和水大理岩的本构模型

冻土的力学特性研究是人类在人工低温岩石工程和寒区岩石工程中必须面对的一个基本问题。国内外关于低温梯度作用下冻土动力本构模型的研究文献较少。本文通过理论分析和实验验证，研究了单轴冲击压缩载荷与低温耦合作用下饱和水大理岩的本构模型。基于力学单元组合理论，建立了考虑应变率效应、损伤软化效应和低温效应的岩石本构模型，并通过拟合方法确定了模型参数。预测了饱和水大理岩在-30℃时的动态应力-应变曲线。预测结果与实验结果吻合较好，一致性相关系数为0.984092。本文的相关研究结果可为负温度条件下岩石工程的开挖与防护提供理论参考。文章信息文章历史:2019年11月30日收稿2020年2月5日接收2020年3月5日在线发布

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来源期刊

Acta Geodynamica et Geomaterialia 地学-地球化学与地球物理

CiteScore

2.30

自引率

0.00%

发文量

期刊介绍： Acta geodynamica et geomaterialia (AGG) has been published by the Institute of Rock Structures and Mechanics, Czech Academy of Sciences since 2004, formerly known as Acta Montana published from the beginning of sixties till 2003. Approximately 40 articles per year in four issues are published, covering observations related to central Europe and new theoretical developments and interpretations in these disciplines. It is possible to publish occasionally research articles from other regions of the world, only if they present substantial advance in methodological or theoretical development with worldwide impact. The Board of Editors is international in representation.