基于3D-ILC含内裂纹孔口脆性固体断裂特性试验

doi:10.16285/j.rsm.2018.0681

岩土力学 ›› 2019, Vol. 40 ›› Issue (6): 2200-2212.doi: 10.16285/j.rsm.2018.0681

基于3D-ILC含内裂纹孔口脆性固体断裂特性试验

王海军1，郁舒阳2，任然3，汤雷1，李欣昀4，贾宇1

1. 南京水利科学研究院水文水资源与水利工程国家重点实验室，江苏南京 210029；2. 河海大学水利水电学院，江苏南京 210098； 3. 香港城市大学建筑与土木工程学院，香港九龙 999077；4. 香港理工大学土木及环境工程学系，香港九龙 999077

收稿日期:2018-04-22 出版日期:2019-06-11 发布日期:2019-06-22
通讯作者: 汤雷，男，1971年生，博士，教授，主要从事岩石力学方面的研究。E-mail: ltang@nhri.cn E-mail:hjwang@nhri.cn
作者简介:王海军，男，1985年生，博士，高级工程师，主要从事断裂力学及记忆岩石力学等方面的研究工作。
基金资助:
国家重点研发计划项目（No.2016YFC0401801）；国家自然科学基金（No.51409170，No.51739008）；江苏省自然科学基金面上项目（No.BK20171130）；中央级公益性科研院所基本科研业务费专项资金项目（No.Y419005）。

Study on failure of brittle solids with circular hole and internal crack based on 3D-ILC

WANG Hai-jun1, YU Shu-yang2, REN Ran3, TANG Lei1, LI Xin-yun4, JIA Yu1

1. State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing, Jiangsu 210029, China; 2. Water Resources and Hydropower Engineering, Hohai University, Nanjing, Jiangsu 210098, China; 3. College of Civil and Architecture Engineering, City University of Hong Kong, Kowloon, Hong Kong 999077, China; 4. Department of Civil and Environmental Engineering, Hong Kong Polytechnic Unversity, Kowloon, Hong Kong 999077, China

Received:2018-04-22 Online:2019-06-11 Published:2019-06-22
Supported by:
This work was supported by the National Key Research and Development Program of China(2016YFC0401801), the National Natural Science Foundation of China (51409170, 51739008), the General Program of Natural Science Foundation of Jiangsu Province (BK20171130) and the Scientific Research Foundation for Central Research Institutes (Y419005).

摘要/Abstract

摘要： 孔口问题为力学领域中经典问题之一，也是岩土如隧洞、巷道等工程领域重要的问题之一。随断裂力学的发展，对含裂纹孔口问题的研究也不断深入。但是，以往研究多集中在二维问题或者含表面裂纹的孔口问题，含纯内裂纹的孔口问题研究报道较少。基于3D-ILC技术（对表面无任何影响的情况下，凭空生成任意参数的深埋内裂纹），在含有孔口的脆性材料中生成内裂纹，开展单轴压缩试验，与无裂纹完整孔口试样试验结果及已有文献进行对比，并开展理论与数值模拟研究。结果表明：（1）3D-ILC与传统方法相比，裂纹特征更为真实，为解决断裂力学中的三维内裂纹问题奠定了基础；（2）完整孔口试样裂纹形态主要有主裂纹与八字形裂纹；（3）含内裂纹试样裂纹形态以内裂纹扩展为主，主要有翼裂纹、次生裂纹、反翼裂纹、反向次生裂纹、竖向扭曲裂纹与主裂纹6种；（4）含裂纹孔口试样最终的破坏荷载比无裂纹孔口试样平均低76.49%，起裂应力较无裂纹孔口试样平均低96.72%；（5）通过数值模拟对完整孔口试样、含主裂纹孔口试样、含内裂纹孔口试样的裂纹扩展进行定性分析，与试验结论一致。该研究结果为含三维内裂纹的孔口脆性材料的断裂理论研究提供了物理试验基础。

关键词: 3D-ILC, 断裂力学, 裂纹扩展, 孔口问题, 脆性材料, 三维内裂纹

Abstract: The stress analysis of the circular hole is one of the classical problems in the mechanics, and as well in tunnel and roadway engineerings. With the development of fracture mechanics, the research on the hole with cracks has been deepened. However, previous studies mainly focused on the two-dimensional problems or holes with surface cracks, and there are few reports on the hole problems with three-dimensional internal cracks. Firstly, based on the 3D-ILC method, the deep internal cracks were generated in brittle materials containing circular holes. The uniaxial compression tests were performed on the specimens with internal cracks. The experimental results are compared with the existing literatures, and the theoretical and numerical simulation studies are carried out. Results show that: 1) Compared with traditional methods, the 3D-ILC method has more realistic crack characteristics and lays a foundation for solving the three-dimensional internal crack problem in fracture mechanics. 2) The main crack shapes of intact specimens are the primary crack and remote crack. 3) For the specimenes with internal cracks, the main crack shapes are the wing crack, secondary crack, anti-wing crack, anti-secondary crack, vertical torsional crack and primary crack. 4) The ultimate failure load of the specimen with cracks is 76.49% of the intact specimen, while the crack initiation stress is 96.72%. 5) The simulation results are in accordance with the experimental results. This study provides an experimental basis for the corresponding theoretical research.

Key words: 3D-ILC, fracture mechanics, crack propagation, problem with circular hole, brittle solids, 3D internal crack

中图分类号:

TU45

王海军, 郁舒阳, 任然, 汤雷, 李欣昀, 贾宇, . 基于3D-ILC含内裂纹孔口脆性固体断裂特性试验[J]. 岩土力学, 2019, 40(6): 2200-2212.

WANG Hai-jun, YU Shu-yang, REN Ran, TANG Lei, LI Xin-yun, JIA Yu, . Study on failure of brittle solids with circular hole and internal crack based on 3D-ILC[J]. Rock and Soil Mechanics, 2019, 40(6): 2200-2212.

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基于3D-ILC含内裂纹孔口脆性固体断裂特性试验

Study on failure of brittle solids with circular hole and internal crack based on 3D-ILC

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