岩石力学与工程学报
巖石力學與工程學報
암석역학여공정학보
CHINESE JOURNAL OF ROCK MECHANICS AND ENGINEERING
2010年
1期
34-42
,共9页
柯建仲%许世孟%陈昭旭%冀树勇
柯建仲%許世孟%陳昭旭%冀樹勇
가건중%허세맹%진소욱%기수용
岩石力学%应力强度因子%各向异性%边界元法%裂纹传播
巖石力學%應力彊度因子%各嚮異性%邊界元法%裂紋傳播
암석역학%응력강도인자%각향이성%변계원법%렬문전파
rock mechanics%stress intensity factors(SIFs)%anisotropic%boundary element method(BEM)%crack propagation
利用边界元法来探讨各向异性大理岩的裂纹传播特性,如应力强度因子与裂纹倾角及材料各向异性的关系、裂纹初始开裂角度与裂纹传播路径的预测及仿真分析.将边界元法结合最大围压断裂准则来预测各向异性材料的裂纹初始开裂角度及模拟各向异性材料的裂纹传播路径,并将数值分析结果与前人的初始开裂角度及试验所观察的传播路径得到的结果进行比较,研究结果表明,数值分析结果与试验结果均较为吻合.因此,所提出的裂纹传播方式可准确地分析各向同性及各向异性材料的裂纹传播特性.
利用邊界元法來探討各嚮異性大理巖的裂紋傳播特性,如應力彊度因子與裂紋傾角及材料各嚮異性的關繫、裂紋初始開裂角度與裂紋傳播路徑的預測及倣真分析.將邊界元法結閤最大圍壓斷裂準則來預測各嚮異性材料的裂紋初始開裂角度及模擬各嚮異性材料的裂紋傳播路徑,併將數值分析結果與前人的初始開裂角度及試驗所觀察的傳播路徑得到的結果進行比較,研究結果錶明,數值分析結果與試驗結果均較為吻閤.因此,所提齣的裂紋傳播方式可準確地分析各嚮同性及各嚮異性材料的裂紋傳播特性.
이용변계원법래탐토각향이성대리암적렬문전파특성,여응력강도인자여렬문경각급재료각향이성적관계、렬문초시개렬각도여렬문전파로경적예측급방진분석.장변계원법결합최대위압단렬준칙래예측각향이성재료적렬문초시개렬각도급모의각향이성재료적렬문전파로경,병장수치분석결과여전인적초시개렬각도급시험소관찰적전파로경득도적결과진행비교,연구결과표명,수치분석결과여시험결과균교위문합.인차,소제출적렬문전파방식가준학지분석각향동성급각향이성재료적렬문전파특성.
The development of a unified numerical framework based on the boundary element method(BEM) for modeling crack propagation behavior in anisotropic rock is presented. The BEM formulation combined with the maximum circumferential stress criterion is used to predict the crack initiation angles and to simulate the crack propagation paths. To demonstrate the proposed BEM procedure to predict crack propagation in anisotropic rock,the propagation path in cracked straight-through Brazilian disc(CSTBD) specimen is numerically predicted and compared with the actual laboratory observations. Good agreement is found between the two approaches. It is therefore concluded that the proposed BEM procedure can accurately simulate the process of crack propagation for anisotropic rock.
