摘要
为研究三维深埋裂纹水力压裂裂纹扩展规律,利用Franc3D软件模拟了裂纹扩展过程。结果表明,水力压裂裂纹扩展因子越大,裂纹扩展形态由原来的翼形包裹状裂纹扩展逐渐转变为自相似扩展;裂纹长轴端点的裂纹扩展速率要小于裂纹短轴端点;裂纹Ⅰ型、Ⅲ型应力强度因子在裂纹长轴端点达到最小,在短轴端点达到最大,而Ⅱ型应力强度因子则相反;水力压裂裂纹扩展因子越大,裂纹的3个应力强度因子的绝对值也越大。
In order to study the crack propagation law of hydraulic fracturing with three dimensional deep buried cracks, the crack propagation process is simulated by Franc3D software. The results show that,(a) the larger the crack growth factor D is, the shape of crack propagation is gradually changed from original airfoil wrapped crack growth to self-similar growth;(b) the crack growth rate at the end of long axis is smaller than that at the end of short axis;(c) the stress intensity factor of Mode I and Mode III is smallest at the end of long axis and maximum at the end of short axis, but the stress intensity factor of Mode II is opposite;and (d) the larger the crack growth factor D is, the greater the absolute value of three stress intensity factors are.
作者
陈礼婧
张敏
CHEN Lijing;ZHANG Min(Guangxi Institute of Technical, Civil Engineering (Construction Material) College, Chongzuo 532200, Guangxi, China;Institute of Civil Engineering, Jiangxi Science and Technology Normal University, Nanchang 330013, Jiangxi, China)
出处
《水力发电》
北大核心
2019年第5期34-38,共5页
Water Power
基金
国家自然科学基金资助项目(51368007)
