摘要
为了解喀喇昆仑公路(中国段)部分区域岩石力学性能,采用数字图像相关技术,对采集的不同岩性岩石,在三点弯曲和单轴压缩的载荷作用下,进行了岩样位移场、裂缝起裂、扩展等动态演化规律的实验研究。通过定量和定性分析,得出了裂纹演化及路径因岩石种类不同有所区别,三点弯曲岩样裂纹发生部位在受拉应力一侧,单轴压缩试件在边角处局部压溃导致破坏,通过比较裂纹演化,千枚岩和片麻岩裂纹沿应力最大处纵向延伸,云母片岩裂纹受层理和应力等因素影响,裂纹呈锯齿形延伸。实验结果对提高这一地域岩石破坏机理的认识,为防灾减灾及工程设施施工提供数据积累和参考。
In order to understand the mechanical properties of rock in part of Karakoram(China Section), the dynamic evolution laws of rock sample displacement field, fracture initiation and propagation were studied by using digital image correlation technology under three-point bending and uniaxial compression. Through the quantitative and qualitative analysis, it is concluded that the crack evolution and path are different due to different rock types. The crack of three-point bending rock sample occurs at the side of tensile stress, and the uniaxial compression specimen is at the corner. Local crushing leads to failure. By comparing the crack evolution, the cracks of phyllite and gneiss extend longitudinally along the maximum stress, while the cracks of mica schist are damaged under the influence of bedding and stress, the cracks extend zigzag. The experimental results can improve the understanding of rock failure mechanism in this area, and provide data accumulation and reference for disaster prevention and mitigation and engineering facilities construction.
作者
米红林
杨晓东
色麦尔江·麦麦提玉苏普
何斌
MI Honglin;YANG Xiaodong;SEMERJAN·Memetyusup;HE Bin(School of Civil Engineering,Kashi University,Kashi 844008,China;School of Mechanical Engineering,Shanghai Institute of Technology,Shanghai 201418,China)
出处
《光学技术》
CAS
CSCD
北大核心
2021年第3期366-371,共6页
Optical Technique
基金
新疆维吾尔自治区天山青年计划项目(2018Q029)
新疆维吾尔自治区自然科学基金面上项目(2019D01A02)。
