%0 Journal Article
%T STUDY ON CRACK INITIATION MECHANISM OF THREE GORGES GRANITE<br>三峡花岗岩起裂机制研究
%A ZHU Zeqi
%A SHENG Qian
%A LENG Xianlun
%A ZHANG Zhanrong
%A <br>朱泽奇
%A 盛 谦
%A 冷先伦
%A 张占荣
%J 岩石力学与工程学报
%D 2007
%I 
%X Based on the conventional triaxial compression test of Three Gorges granites,the crack initiation stress under different confining pressures can be obtained by studying the crack strain curves.The result shows that the crack initiation stress changes at the same extent with confining pressure;compared with the peak strength,the crack initiation stress is generally located between 25% and 50% of the peak strength.Through experimental and theoretical analyses,it is found that the microcosmic failure of Three Gorges granites is mainly induced by tensile cracks under uniaxial and triaxial compressive conditions;and the cracks inside the granite belong to I-mode fracture in stable crack growth stage.Furthermore,the fracture mechanical model of Three Gorges granite is established in order to study the relationship between crack initiation stress,crack initiation angle and confining pressure.Some beneficial conclusions are drawn.
%K rock mechanics
%K Three Gorges granite
%K crack strain
%K crack initiation stress
%K tensile failure<br>岩石力学
%K 三峡花岗岩
%K 裂纹应变
%K 起裂应力
%K 拉伸破坏
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=D3421FAA1A0A0F0C&jid=35E747D791A1346351AFB523B7FA35CB&aid=C069975A2C5B0F443629D92D50818636&yid=A732AF04DDA03BB3&vid=96C778EE049EE47D&iid=59906B3B2830C2C5&sid=E47E46FC9ED0D928&eid=36C3C15DA6BD0E96&journal_id=1000-6915&journal_name=岩石力学与工程学报&referenced_num=0&reference_num=16