[1]张仕林,杜贻腾,李廷春,等.单轴压缩荷载下红砂岩不同张开度三维通透裂隙扩展机理研究[J].西安科技大学学报,2016,(04):548-553.[doi:10.13800/j.cnki.xakjdxxb.2016.0415]
 ZHANG Shi-lin,DU Yi-teng,LI Ting-chun,et al.Propagation mechanism of 3D through fracture with different width under uniaxial load[J].Journal of Xi'an University of Science and Technology,2016,(04):548-553.[doi:10.13800/j.cnki.xakjdxxb.2016.0415]
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单轴压缩荷载下红砂岩不同张开度三维通透裂隙扩展机理研究(/HTML)
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西安科技大学学报[ISSN:1672-9315/CN:61-1434/N]

卷:
期数:
2016年04期
页码:
548-553
栏目:
出版日期:
2016-08-30

文章信息/Info

Title:
Propagation mechanism of 3D through fracture with different width under uniaxial load
文章编号:
1672-9315(2016)04-0548-06
作者:
张仕林12杜贻腾2李廷春2张国朋2刘启顺2
1.中国石油天然气华东勘察设计研究院岩土工程处,山东 青岛 266071;
2.山东科技大学 山东省土木工程防灾减灾重点实验室,山东 青岛 266590
Author(s):
ZHANG Shi-lin 12DU Yi-teng2LI Ting-chun2 ZHANG Guo-peng2LIU Qi-shun2
1.Geotechnical Engineering Company of East China Design Institute,CNPC,Qingdao 266071 China;
2.Shandong Provincial Key Laboratory of Civil Engineering Disaster Prevention and Mitigation, Shandong University of Science and Technology,Qingdao 266590,Ch
关键词:
单轴压缩 通透裂隙 张开度 扩展规律 数值模拟
Keywords:
uniaxial load through fracture width law of crack growth numerical simulation
分类号:
TU 452
DOI:
10.13800/j.cnki.xakjdxxb.2016.0415
文献标志码:
A
摘要:
采用自制的模具在圆柱体红砂岩标准试件上分别加工了不同张开度的通透裂隙,通过单轴压缩试验和数值模拟的方法,系统分析了不同张开度条件下岩石裂隙的扩展机理。试验结果显示,含裂隙试件的峰值强度、起裂强度以及弹性模量等力学参数随裂隙张开度的增大均呈线性减小的趋势,其中峰值强度的变化幅度较小,而起裂强度与弹性模量受裂隙张开度变化的影响较明显; 不同张开度裂隙的初始起裂均在裂尖位置以翼裂纹的形式展开,扩展至峰值状态前后,受张开度的影响出现了明显差异。数值模拟结果显示,加载过程中裂隙尖端拉应力集中区域随裂隙张开度的增大逐渐增大,但始终未到达试件边界,而剪应力集中的范围比较稳定基本不随裂隙张开度的变化而改变。
Abstract:
The uniaxial compression test and numerical simulation are employed to systematically analyze through fractures with different widths processed by homemade mold on standard specimens.Test and numerical results are obtained as follows:mechanical parameters such as peak strength,splitting strength and elasticity modulus of specimens with fractures show a liner decrease trend with the enlarge of fracture apertures,change of fracture apertures has small effect on peak strength and it has obvious effect on splitting strength and elasticity modulus; fractures with different widths start at crack-tip and extend in the form of wing cracks,and there has an obvious difference affected by width when it extends before and after peak state; during the load process,tensile stress concentration area at crack tips would enlarge along with the enlarge offracture apertures,but never reach the specimen border,and the range of shear stress concentration is relatively stable,which would not change along with the change of fracture apertures.

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备注/Memo

备注/Memo:
基金项目:国家自然科学基金(51279096)
通讯作者:张仕林(1990-),男,山东临沂人,助理工程师,E-mail:zhangshilin2015.se@cnpc.com.cn
更新日期/Last Update: 2016-07-15