弹性范围内不同加载速率下的波速特征及能耗分析

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英文篇名：Wave Velocity Characteristics at Different Loading Rates in Elastic Range and Energy Consumption Analysis 作者：马春德 ; 郭春志 ; 刘泽霖 ; 周亚楠 ; 龙珊 英文作者：MA Chun-de;GUO Chun-zhi;LIU Ze-lin;ZHOU Ya-nan;LONG Shan;Center for Advanced Studies, Central South University;School of Resources and Safety Engineering, Central South University; 关键词：岩石力学 ; 单轴压缩 ; 花岗岩 ; 加载速率 ; 波速-应力 ; 能量损耗 英文关键词：rock mechanics;;uniaxial compression;;granite;;loading rate;;wave velocity-stress;;energy loss 中文刊名：矿冶工程 英文刊名：Mining and Metallurgical Engineering 机构：中南大学高等研究中心;中南大学资源与安全工程学院; 出版日期：2019-04-15 出版单位：矿冶工程 年：2019 期：02 基金：新疆维吾尔自治区重大科技专项资助(2018A03003-2);; 深部岩体力学与开采理论资助项目(2016YFC0600706) 语种：中文; 页：13-16+21 页数：5 CN：43-1104/TD ISSN：0253-6099 分类号：TU45

摘要

为了探究不同加载速率下波速-应力的变化规律以及能量损耗特征,采用硬岩材料大理岩进行了单轴压缩下弹性范围内不同加载速率下的试验研究,测试了加载速率对波速以及能量的影响规律。结果表明,加载速率的变化不会影响波速-应力之间的总体变化规律,波速-应力依然符合线性关系,但低加载速率和高加载速率下的线性关系显现不明显;不同应力条件下加载速率-波速曲线呈现了3个阶段,分别为压密-弹性过渡阶段、弹性阶段和弹性-损伤过渡阶段,整体上加载速率对波速的影响不大;大理岩在不同阶段吸收的总能量较为稳定,弹性能在压密-弹性过渡阶段和弹性阶段较为稳定,而在弹性-损伤过渡阶段出现缓慢的减小,耗散能在整个阶段都出现了明显的减小。
        In order to investigate the variation of wave velocity-stress and energy loss at different loading rates, the hard rock marble material was tested under different loading rates in the elastic range under uniaxial compression, and the effect of loading rate on wave velocity and energy was explored. The results showed that the different loading rate did not bring influence on the overall variation law for the wave velocity-stress. It still followed a linear relationship, which, however, was not obvious under low loading rate and high loading rate. The curve of loading rate vs wave velocity under different stress included the following three phases: compaction-elastic transition phase, elastic phase and elastic-damage transition phase. The overall loading rate had little effect on the wave velocity and the total energy absorbed by marble in different phases was relatively stable. The elastic energy was relatively stable in the compression-elastic transition phase and the elastic phase, but slowly reduced in the elastic-damage transition phase. The dissipation energy was significantly reduced throughout the entire phases.

引文

[1] 尹小涛,葛修润,李春光,等.加载速率对岩石材料力学行为的影响[J].岩石力学与工程学报,2010,29(增1):2610-2615.
    [2] 苏承东,李怀珍,张盛,等.应变速率对大理岩力学特性影响的试验研究[J].岩石力学与工程学报,2013,32(5):943-950.
    [3] 陈琳,徐小丽,徐银花.温度与加载速率对岩石力学性质的影响[J].广西大学学报(自然科学版),2016,41(1):170-177.
    [4] 赵忠虎,谢和平.岩石变性破坏过程中的能量传递和耗散研究[J].四川大学学报:工程科学版,2008,40(2):26-31.
    [5] 谢和平,鞠杨,黎立云,等.岩体变形破坏过程的能量机制[J].岩石力学与工程学报,2008,27(9):1729-1740.
    [6] 陈祥,孙进忠,谭朝爽,等.岩块波速-应力关系及其卸荷效应[J].岩土工程学报,2010,32(5):757-761.
    [7] 施行觉,夏从俊,吴永刚.储存条件下波速的变化规律及其影响因素的实验研究[J].地球物理学报,1998,41(2):234-241.
    [8] 施行觉,孙道远.循环应力作用下松散介质的波速和衰减特性[J].岩土工程学报,2001,23(1):114-116.
    [9] 马春德,郭春志,付伟,等.弹性范围内加卸载时岩石波速-应力-储能对应关系研究[J].矿冶工程,2018,38(1):11-15.
    [10] Qi C Z,Wang M Y,Qian Q H.Strain-rate effects on the strength and fragmentation size of rocks[J].International Journal of Impact Engineering,2009,36(12):1355-1364.
    [11] 黄晓程,李海波,夏祥,等.单轴压缩下加载速率对石膏波速变化影响的试验研究[J].水电能源科学,2013,31(9):89-91.
    [12] 谢和平,鞠杨,黎立云.基于能量耗散与释放原理的岩石强度与整体破坏准则[J].岩石力学与工程学报,2005(17):3003-3010.