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采用压缩单裂纹圆孔板确定岩石动态起裂、扩展和止裂韧度

张财贵 曹富 李炼 周妍 黄润秋 王启智

张财贵, 曹富, 李炼, 周妍, 黄润秋, 王启智. 采用压缩单裂纹圆孔板确定岩石动态起裂、扩展和止裂韧度[J]. 力学学报, 2016, 48(3): 624-635. doi: 10.6052/0459-1879-15-349
引用本文: 张财贵, 曹富, 李炼, 周妍, 黄润秋, 王启智. 采用压缩单裂纹圆孔板确定岩石动态起裂、扩展和止裂韧度[J]. 力学学报, 2016, 48(3): 624-635. doi: 10.6052/0459-1879-15-349
Zhang Caigui, Cao Fu, Li Lian, Zhou Yan, Huang Runqiu, Wang Qizhi. DETERMINATION OF DYNAMIC FRACTURE INITIATION, PROPAGATION, AND ARREST TOUGHNESS OF ROCK USING SCDC SPECIMEN[J]. Chinese Journal of Theoretical and Applied Mechanics, 2016, 48(3): 624-635. doi: 10.6052/0459-1879-15-349
Citation: Zhang Caigui, Cao Fu, Li Lian, Zhou Yan, Huang Runqiu, Wang Qizhi. DETERMINATION OF DYNAMIC FRACTURE INITIATION, PROPAGATION, AND ARREST TOUGHNESS OF ROCK USING SCDC SPECIMEN[J]. Chinese Journal of Theoretical and Applied Mechanics, 2016, 48(3): 624-635. doi: 10.6052/0459-1879-15-349

采用压缩单裂纹圆孔板确定岩石动态起裂、扩展和止裂韧度

doi: 10.6052/0459-1879-15-349
基金项目: 高等学校博士学科点专项科研基金(201301181130013)和地质灾害防治与地质环境保护国家重点实验室开放基金(SKLG2016K015)资助项目.
详细信息
    通讯作者:

    王启智,教授,主要研究方向:岩石和混凝土等材料和结构的动态断裂.E-mail:qzwang2004@163.com

  • 中图分类号: O346;O347.3

DETERMINATION OF DYNAMIC FRACTURE INITIATION, PROPAGATION, AND ARREST TOUGHNESS OF ROCK USING SCDC SPECIMEN

  • 摘要: 爆炸、冲击、地震等人为或自然灾害不可避免,经常造成大量土木工程设施的破坏,因此岩石在动态载荷作用下的行为受到特别关注.岩石动态断裂韧度是评价岩石抵抗裂纹动态起裂、扩展和止裂性能的材料参数,开展岩石动态断裂韧度测试方法的研究对相关理论基础和实验技术的要求较高.岩石动态断裂韧度分为动态起裂、动态扩展、动态止裂三种,虽然关于动态起裂和动态扩展的研究已有一些成果,对岩石动态止裂的研究仍是一个难题,至今几乎无人问津.研究表明,在分离式霍普金森压杆撞击压缩单裂纹圆孔板岩石试样的I型动态断裂试验中,动态起裂、扩展、止裂的全过程可以由黏贴在压缩单裂纹圆孔板试样上的裂纹扩展计监测,岩石的动态起裂、扩展、止裂韧度可以用实验-数值-解析法确定.特别值得一提的是首次测出了岩石的动态止裂韧度.裂纹扩展计信号还显示,压缩单裂纹圆孔板在止裂后,停止的裂纹还会再次动态起裂、扩展并超出裂纹扩展计的检测范围.从能量的角度分析了动态止裂的过程,指出测试动态止裂韧度时要注意的一些问题.结果显示,岩石动态起裂韧度和动态扩展韧度分别随动态加载率和裂纹扩展速度的增大而增大,岩石动态起裂韧度略大于动态止裂韧度.

     

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出版历程
  • 收稿日期:  2015-09-18
  • 修回日期:  2016-01-28
  • 刊出日期:  2016-05-18

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