岩土力学 ›› 2021, Vol. 42 ›› Issue (2): 439-450.doi: 10.16285/j.rsm.2020.1006

• 基础理论与实验研究 • 上一篇    下一篇

基于DIC的含不同角度3D打印 粗糙交叉节理试样破裂机制研究

王本鑫1, 2，金爱兵1, 2，孙浩1, 2，王树亮1, 2   

  1. 1. 北京科技大学 金属矿山高效开采与安全教育部重点实验室，北京 100083；2. 北京科技大学 土木与资源工程学院，北京 100083
  • 收稿日期:2020-07-15 修回日期:2020-09-10 出版日期:2021-02-10 发布日期:2021-02-09
  • 通讯作者: 孙浩，男，1992年生，博士，讲师，主要从事采矿工艺与理论、岩石力学方面的教学与研究工作。E-mail：sunhao2019@ustb.edu.cn E-mail:wang_ben_xin@163.com
  • 作者简介:王本鑫，男，1991年生，博士研究生，主要从事节理岩体力学破裂特性、数字图像分析及数值计算方面的研究。
  • 基金资助:
    国家自然科学基金（No. 51674015）；中央高校基本科研业务费专项资金（No. FRF-TP-19-026A1）；中国博士后科学基金项目（No. 2020M670138）。

Study on fracture mechanism of specimens with 3D printed rough cross joints at different angles based on DIC

WANG Ben-xin1, 2, JIN Ai-bing1, 2, SUN Hao1, 2, WANG Shu-liang1, 2   

  1. 1. Key Laboratory of Ministry of Education for Efficient Mining and Safety of Metal Mine, University of Science and Technology Beijing, Beijing 100083, China; 2. School of Civil and Resources Engineering, University of Science and Technology Beijing, Beijing 100083, China
  • Received:2020-07-15 Revised:2020-09-10 Online:2021-02-10 Published:2021-02-09
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (51674015), the Fundamental Research Funds for the Central Universities (FRF-TP-19-026A1) and the China Postdoctoral Science Foundation Project (2020M670138).

PDF (Chinese)

250

摘要： 粗糙交叉节理广泛存在于实际岩体中，含不同角度粗糙交叉节理试样的力学破裂演化特性研究对岩体工程具有重要的指导意义。基于Barton节理轮廓曲线，通过3D打印技术制作不同角度粗糙交叉节理模型，浇筑成试样后进行单轴压缩试验，并采用DIC技术对试样表面的变形特征进行了处理与分析。结果表明：主节理倾角较大试样的单轴强度基本小于主节理倾角较小试样，主次节理夹角 在45°～60°之间时对试样的单轴抗压强度和弹性模量影响最大；通过对DIC应变云图、节理尖端全程应变和应变率激增点分析可知，起裂主要发生在主节理上下端和次节理上端，起裂应力在峰值应力的90%至峰值阶段，屈服阶段裂隙扩展速度缓慢，快速扩展主要发生在峰后阶段；粗糙交叉节理试样的起裂方向与平直节理试样不同，节理尖端裂隙多以剪切形式存在，远端在最大主应力的作用下多演化为张拉裂隙；主节理下端的应力强度因子基本大于次节理上端，说明主节理对试样的破裂起主要作用，节理尖端的KII多大于KI，说明起裂扩展受剪切作用大于张拉作用。

关键词: DIC, 3D打印, 粗糙交叉节理, 破裂演化, 应力强度因子

Abstract: Rough cross joints widely exist in actual rock mass. The laboratory study on the mechanical fracture evolution of specimens with rough cross joints at different angles can provide important guidance for rock mass engineering. Based on Barton joint profile, we use 3D printing to generate rough cross joint models with different angles. Then we carry out uniaxial compressive tests after pouring the specimens. The deformation characteristics of the surface are processed and analyzed by the digital image correlation (DIC) technology. The results show that the uniaxial strength of specimens with larger dips of primary joint is less than that of specimens with smaller dips. The influence on the uniaxial compressive strength and elastic modulus of the specimen is most significant when the angle γ between the primary and secondary joints is between 45° and 60°. We analyze the obtained strain contour figures by DIC, as well as the whole range of strain of joint tips and strain rate surge points. The observations are listed as follows. The fracture initiation mainly occurs at the upper and lower ends of primary joint and the upper end of secondary joint, and the initiation stress is between 90% of the peak stress and the peak. The fracture propagation rate is slow in the yield stage, and the rapid expansion mainly occurs in the post-peak stage. The fracture initiation direction of the rough cross joint specimen is different from that of the smooth joint specimen. The fracture at the tips of joints is mostly in the form of shear, and evolves into tensile fracture under the action of maximum principal stress. The stress intensity factor at the lower end of the primary joint is larger than that at the upper end of the secondary joint, which indicates that the primary joint plays the main role in the fracture of the specimen. KII at the joint tipis is greater than KI, which indicates that the shear effect is greater than the tensile effect on the initiation and propagation of fracture.

Key words: DIC, 3D printing, rough cross joints, fracture evolution, stress intensity factors

中图分类号: TU 45
[1] 侯小强, 杨芮, 李瑞冬, 樊小鹏, 郑佳乐, 侯宝胜, . 卵石土混合体随机生成方法与宏细观力学演化特性研究[J]. 岩土力学, 2025, 46(9): 2967-2979.
[2] 沈扬, 沈嘉毅, 梁晖, 樊科伟. 基于3D打印技术的仿真钙质砂三轴试验研究[J]. 岩土力学, 2025, 46(8): 2353-2362.
[3] 孙闯, 蒲云波, 敖云鹤, 陶琦, . 冻融饱水裂隙砂岩力学特性及细观破裂演化特征研究[J]. 岩土力学, 2025, 46(8): 2339-2352.
[4] 于天佑, 蒋关鲁, 饶千竺, 朱丹, 陈虹羽, 刘先峰, . 水汽循环作用下红层泥岩的损伤劣化特性研究[J]. 岩土力学, 2025, 46(2): 479-491.
[5] 王培涛, 黄浩, 张博, 王路军, 杨毅, . 基于3D打印的粗糙结构面模型表征及渗流特性试验研究[J]. 岩土力学, 2024, 45(3): 725-736.
[6] 王磊, 商瑞豪, 刘怀谦, 陈礼鹏, 张宇, 王安铖, 张帅, 刘化强, . 荷载作用下多裂隙煤体力学特性与起裂角研究[J]. 岩土力学, 2024, 45(3): 659-673.
[7] 张宪尚, 文光才, 朱哲明, 隆清明, 刘杰, . 冲击荷载下充填节理岩体I型裂纹动态扩展特性研究[J]. 岩土力学, 2024, 45(2): 396-406.
[8] 罗国立, 张科, 齐飞飞, 朱辉, 张凯, 刘享华, . 基于3D打印的裂隙岩体力学特性尺寸效应及各向异性初探[J]. 岩土力学, 2023, 44(S1): 107-116.
[9] 田威, 王肖辉, 云伟, 程续. 基于不同后处理方法的砂型3D打印类岩石试样力学性能研究[J]. 岩土力学, 2023, 44(5): 1330-1340.
[10] 岳豪, 杨胜利, 翟瑞昊, 张燊, 崔轩. 含砂岩石力学特性及其致灾机制研究[J]. 岩土力学, 2023, 44(4): 1230-1244.
[11] 宋勇军, 孙银伟, 李晨婧, 杨慧敏, 张磊涛, 谢丽君, . 基于离散元法模拟的冻融砂岩细观破裂演化特征研究[J]. 岩土力学, 2023, 44(12): 3602-3616.
[12] 张涛, 徐卫亚, 孟庆祥, 王环玲, 闫龙, 钱坤, . 基于3D打印技术的柱状节理岩体试样 力学特性试验研究[J]. 岩土力学, 2022, 43(S2): 245-254.
[13] 张东晓, 郭伟耀, 赵同彬, 谷雪斌, 陈玏昕, . 岩石I型裂纹定向扩展规律试验研究[J]. 岩土力学, 2022, 43(S2): 231-244.
[14] 杨恩光, 杨立云, 胡桓宁, 汪自扬, 张飞. 单轴压缩荷载下闭合裂纹扩展的试验和数值研究[J]. 岩土力学, 2022, 43(S1): 613-622.
[15] 范杰, 朱星, 胡桔维, 唐垚, 贺春蕾, . 基于3D-DIC的砂岩裂纹扩展及损伤监测试验研究[J]. 岩土力学, 2022, 43(4): 1009-1019.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
No Suggested Reading articles found!
版权所有 © 《岩土力学》编辑部
地址：湖北武汉武昌小洪山中国科学院武汉岩土力学研究所(430071)　邮编：200042　电话：027-87198484　E-mail: ytlx@whrsm.ac.cn
本系统由北京玛格泰克科技发展有限公司设计开发