Rock damage calculation method based on the damage release energy

被引：0
|
作者：
Lei M. [1 ,2 ]
Zhao C. [1 ]
Zeng C. [3 ]
Jia C. [1 ]
Xu J. [3 ]
Huang J. [1 ]
机构：
[1] School of Civil Engineering, Central South University, Hunan, Changsha
[2] MOE, Key Lab of Heavy Haul Railway Engineering Structure, Central South University, Hunan, Changsha
[3] Guizhou Road and Bridge Group Co.，Ltd., Guizhou, Guiyang
来源：
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | 2022年 / 41卷 / SUPPLEMENT 2期
基金：
湖南省自然科学基金; 中国国家自然科学基金;
关键词：
cyclic loading; damage calculation method; damage release energy; rock mechanics; uniaxial loading;
D O I：
10.13722/j.cnki.jrme.2022.0065
中图分类号：
学科分类号：
摘要：
The existing rock damage calculation methods have the problem of inconsistent energy calculation results for the uniaxial loading and cyclic loading. To solve this problem，both the existing calculation methods and the energy conversion mechanism are analyzed，a rock damage calculation method based on damage release energy is further proposed，and the indoor tests were conducted to verified its reliability. The research results indicate that the dissipated energy and the elastic energy released when rock sample fails are related to its damage state. These two kinds of energies can be defined as damage release energy. It is the absorbed energy from the loading to the failure in the case of uniaxial loading. For the case of cyclic loading，it is the sum of that of the initial cycle，the intermediate ones，and the final loading stage. The increment of damage release energy in the initial cycle can be obtained by integrating the loading stage and unloading stage，that in the intermediate cycle is the difference between the dissipated energy of the current cycle and the damping energy of the previous one，and that in the final loading stage is difference between the input energy of the cycle and the damping energy of the previous one. The indoor tests show that the total damage release energies for the same type of rock samples are about the same under uniaxial loading and cyclic loading. The damage evolution of rock sample during cyclic loading can be analyzed on the premise that only the uniaxial loading results are obtained. Besides，this method can better reflect the damage evolution of rock sample with the loading process. © 2022 Academia Sinica. All rights reserved.
引用
收藏
页码：3210 / 3218
页数：8
相关论文
共 25 条
  • [1] Fatigue deformation characteristics and damage model of sandstone subjected to uniaxial step cyclic loading[J], Journal of China University of Mining and Technology, 46, 1, pp. 8-17, (2017)
  • [2] LI Jiangteng, XIAO Feng, MA Yupei, Deformation damage and energy evolution of red sandstone under uniaxial cyclic loading and unloading[J], Journal of Hunan University：Natural Science, 47, 1, pp. 139-146, (2020)
  • [3] LIU Jianpo, LI Yuanhui, YANG Yujiang, Rock damage process based on acoustic emission monitoring under cyclic loading[J], Journal of Northeastern University：Natural Science, 32, 10, pp. 1476-1479, (2011)
  • [4] MIAO Shengjun, LIU Zejing, ZHAO Xingguang, Et al., Energy dissipation and damage characteristics of Beishan granite under cyclic loading and unloading[J], Chinese Journal of Rock Mechanics and Engineering, 40, 5, pp. 928-938, (2021)
  • [5] DUAN Minke, JIANG Changbao, GUO Xianwei, Et al., Experimental study on mechanical and damage characteristics of coal under cyclic true triaxial loading[J], Chinese Journal of Rock Mechanics and Engineering, 40, 6, pp. 1110-1118, (2021)
  • [6] MURAKAMI S., Continuum damage mechanics, pp. 3-10, (2012)
  • [7] XU Lihua，, HUANG Biao, LI Biao, Et al., Study on the stress-strain relation of polypropylene fiber reinforced concrete under cyclic compression[J], China Civil Engineering Journal, 52, 4, pp. 1-12, (2019)
  • [8] CHI Yin, YIN Congru, XU Lihua, Et al., Compressive mechanical properties of steel-polypropylene hybrid fiber reinforced ultrahigh-perfromance concrete under cyclic compression[J], Journal of the Chinese Ceramic Society, 49, 11, pp. 2331-2345, (2021)
  • [9] YANG S Q, RANJITH P G, HUANG Y H，, Et al., Experimental investigation on mechanical damage characteristics of sandstone under triaxial cyclic loading[J], Geophysical Journal International, 201, 2, pp. 662-682, (2015)
  • [10] XU Xiangtian, LAI Yuanming, ZHOU Zhiwei, Et al., Laboratory investigation on the deformation and damage characteristics of frozen loess under triaxial cyclic and monotonic loading conditions[J], Journal of Glaciology and Geocryology, 36, 5, pp. 1184-1191, (2014)
123