###
DOI:
工程科学与技术:2016,48(Z2):80-85
←前一篇   |   后一篇→
本文二维码信息
码上扫一扫!
法向压缩载荷对II型裂纹扩展的影响规律研究
(四川大学建筑与环境学院)
The study of influence law about mode II crack propagation
(School of Architecture and Environment, Sichuan University)
摘要
图/表
参考文献
相似文献
附件
本文已被:浏览 1508次   下载 157
投稿时间:2015-08-23    修订日期:2016-01-07
中文摘要: 压剪共同作用下裂纹是地下岩体中广泛存在的,为了研究法向压缩载荷对剪切型即II型裂纹扩展的影响规律,利用砂岩制作了单边裂纹试件,通过岩石剪切实验系统对不同法向压缩载荷作用下的裂纹进行了剪切实验研究,结果表明法向压缩载荷对裂纹的起裂及扩展起到抑制作用,随着裂纹法线压缩载荷的增大,裂纹起裂角逐渐减小;同时,得出法向压缩载荷与II型裂纹极限应力强度因子之间的关系,随着法向压缩载荷增大,岩石II型裂纹极限应力强度因子也随之增大。运用ABAQUS模拟软件,对不同压缩载荷作用下压剪裂纹的扩展进行模拟研究,得出了裂纹尖端II型应力强度因子随压缩载荷的变化规律。
Abstract:In order to study the impact of the normal compression on shear (mode II) crack propagation, Sandstone is used to make the unilateral crack specimen. Shear experiment on cracks which are under different normal compression loads was carried out by rock deformation test system. The results show that the normal compression loads play an inhibitory effect on the crack initiation and expansion. With the increase of the normal compression loads, initial crack angle decreases. While, the relationship between the normal compression loads and mode II crack critical stress intensity factor is achieved. The rock mode II crack limit stress intensity factor also increases with the increasing normal compression loads. Compression-shear crack propagation was simulated under different compression loads by using ABAQUS. Meanwhile, Variation law of mode II stress intensity factor in crack tip was obtained with variation of compression loads.
文章编号:201500825     中图分类号:    文献标志码:
基金项目:国家自然科学基金项目(51074109);四川省科技计划项目(2014JY0002);油气藏地质及开发工程国家重点实验室资助项目(PLN1202)
作者简介:
引用文本:
何亷,朱哲明.法向压缩载荷对II型裂纹扩展的影响规律研究[J].工程科学与技术,2016,48(Z2):80-85.
Helian,Zhu Zheming.The study of influence law about mode II crack propagation[J].Advanced Engineering Sciences,2016,48(Z2):80-85.