东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2015, Vol. 36 ›› Issue (12): 1733-1737.DOI: 10.12068/j.issn.1005-3026.2015.12.014

• 资源与土木工程 • 上一篇    下一篇

SHPB试验中花岗岩破坏程度与能量耗散关系分析

于水生1， 卢玉斌2， 朱万成1， 蔡勇2   

  1. (1. 东北大学 资源与土木工程学院， 辽宁 沈阳110819; 2. 西南科技大学 制造过程测试技术教育部重点实验室， 四川 绵阳621010)
  • 收稿日期:2014-11-03 修回日期:2014-11-03 出版日期:2015-12-15 发布日期:2015-12-07
  • 通讯作者: 于水生
  • 作者简介:于水生(1988-)，男，河南周口人，东北大学博士研究生; 朱万成(1974-)，男，新疆呼图壁人，东北大学教授，博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(51308480).

Analysis on Relationship Between Degree of Damage and Energy Dissipation of Granite in SHPB Tests

YU Shui-sheng1， LU Yu-bin2， ZHU Wan-cheng1， CAI Yong2   

  1. 1. School of Resources and Civil Engineering， Northeastern University， Shenyang 110819， China; 2. Key Laboratory of Testing Technology for Manufacturing Process of Ministry of Education， Southwest University of Science and Technology，Mianyang 621010， China.
  • Received:2014-11-03 Revised:2014-11-03 Online:2015-12-15 Published:2015-12-07
  • Contact: LU Yu-bin
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摘要： 为了研究花岗岩的应变率效应及其能量耗散与破坏程度之间的关系，利用分离式Hopkinson压杆装置(SHPB)对直径为74 mm的花岗岩试样进行了不同应变率下的单轴冲击压缩试验.试验结果表明，花岗岩动态压缩强度具有很明显的应变率效应；随着应变率的增大，单位体积耗散能增加，且近似呈线性关系，同时应变率也随着能量耗散率的增加而增大，但它们之间表现为非线性关系；花岗岩试样破坏程度与单位体积耗散能存在很好的一致关系，基本一一对应，而与应变率之间并不存在一一对应关系.且试样破坏程度和应变率之间并不存在一一对应关系，与强度随着应变率的增大而增大并不矛盾.

关键词: 岩石力学, SHPB试验, 应变率效应, 能量耗散, 破坏程度

Abstract: A series of uniaxial compression tests under different strain rates on granite samples (74mm) were carried out using split Hopkinson pressure bars (SHPB)， to study the strain-rate effect and the relationship between the degree of damage and energy dissipation of granite. The test results show that the dynamic compression strength of granite has obvious strain rate effect. The energy dissipation per unit volume increases with the increase of strain rate， showing an approximate linear relationship. At the same time， the strain rate also increases with the increase of energy dissipation rate， showing nonlinear relationship. The degree of damage of granite samples has good consistency with the energy dissipation per unit volume， generally with one to one correspondence， but does not have one to one correspondence with the strain rate. There is no contradiction between the degree of damage of granite samples having inconsistence with the strain rate and strength enhancement with the strain rate.

Key words: rock mechanics, SHPB(split Hopkinson pressure bars) test, strain rate effect, energy dissipation, degree of damage

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