砂岩动力损伤力学特性及损伤度影响试验研究
DOI:
作者:
作者单位:

1.厦门大学建筑与土木工程学院;2.厦门大学深圳研究院

作者简介:

通讯作者:

中图分类号:

TU 458

基金项目:

国家自然科学基金资助项目,广东省自然科学基金资助项目


Experimental study on the influence of dynamic damage mechanical characteristics and damage degree of sandstone
Author:
Affiliation:

1.College of architecture and civil engineering of Xiamen University;2.Research Institute Of Xiamen University in Shenzhen, Guangdong Shenzhen

Fund Project:

The National Natural Science Foundation of China ,The National Natural Science Foundation of Guangdong Province

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    摘要:

    选取砂岩为研究对象,利用RLW-2000M型三轴试验机,测试砂岩试样的动应力-应变特性、轴向变形特性;选取轴向应变为损伤变量,推导出损伤度的计算表达式,分析了各因素对损伤度的影响特性。研究结果表明:在动态荷载作用下,轴向变形随着时间的推移而增大,滞回曲线由稀疏变稠密;轴向变形增量随动载幅值的增大而增大,而随着频率的增大呈减小的趋势;试样的损伤度在突变后趋于稳定,且随着动载幅值的增大而增大。研究结论为揭示动态荷载作用下砂岩损伤演化规律提供科学依据。

    Abstract:

    The sandstone is taken as samples, and the RLW-2000M triaxial testing machine is used as the main equipment to test the axial stress-strain, the axial deformation in this paper. The axial strain is selected as damage variables, the damage degree expression is derived, and the effect of each factor on damage degree is studied. Research results show that axial deformation increases with the passage of time, and the hysteresis curve change from sparse to dense under the action of the dynamic loading. The axial deformation increase with the increase of the dynamic loading amplitude, and it increase with the decreased of frequency. The damage degree of specimen tends to be stable after mutation and increases with the increase of the dynamic loading amplitude. The research results will provide the scientific basis for us to disclose the rule of damage evolution of sandstone under the action of dynamic loading.

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引用本文

胡 华,张 越. 砂岩动力损伤力学特性及损伤度影响试验研究[J]. 科学技术与工程, , ():

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  • 收稿日期:2020-05-12
  • 最后修改日期:2020-09-23
  • 录用日期:2020-10-24
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