·1476· 工程科学学报，第39卷，第10期 02 0.60m (b) 0.3 0.55 -0.4 0.50 -05 0.45 -0.6 0.40 -0.15MPa -0.15MPa 0.7 ◆-0.21MPa 0.35 --0.21 MPa 4-0.35MPa ▲-0.35MPa 0.8 -1.05MPa 0.30 -1.05MPa 090 4 5678 0.256 1 2 345 678 卸荷步 卸荷步 0.14[⊙T 012 0.10 0.08 0.06 思 0.04 --0.15MPa 0.02 --0.21 MPa 04 ▲-0.35MPa -1.05MPa -0.02 0.046 12345678 卸荷步 图7不同卸荷速率【()、Ⅱ(b)和Ⅲ(c)型应力强度因子随卸荷步变化规律 Fig.7 Variation in stress intensity factors I (a)(b)and(c)of different unloading velocities along with unloading steps [7]Zhuang X Y,Chun J W,Zhu HH.A comparative study on un- [12]SIMULIA.Abaqus 6.14 Documentation.EB/OL].http:// filled and filled crack propagation for rock-like brittle material. wufengyun.com:888/.2015 Theor Appl Fract Mech,2014,72:110 [13]Huang D,Huang R Q.Physical model test on deformation failure [8]Yu T T.The extended finite element method (XFEM)for discon- and crack propagation evolvement of fissured rocks under unloa- tinuous rock masses.Eng Computation,2011,28(3):340 ding.Chin J Rock Mech Eng,2010,29(3):502 [9]Deb D,Das K C.Extended finite element method for the analysis (黄达.黄润秋.卸荷条件下裂隙岩体变形破坏及裂纹扩展演化 of discontinuities in rock masses.Geotech Geol Eng,2010,28 的物理模型试验.岩石力学与工程学报.2010,29(3)：502) (5):643 [14]Xu Z L.Elastic Mechanics Biref Tutorial.4th Ed.Beijing: [10]Belytschko T,Black T.Elastic crack growth in finite elements Higher Education Press,2013 with minimal remeshing.Int Num Method Eng,1999,45(5): (徐芝纶.弹性力学简明教程.4版.北京：高等教育出版 601 社，2013) [11]Moes N,Dolbow J,Belytschko T.A finite element method for [15]Ayhan A 0.Mixed mode stress intensity factors for deflected and crack growth without remeshing.Int Num Method Eng,1999, inclined corner cracks in finite-thickness plates.Int/Fatigue, 46(1):131 2007,29(2):305工程科学学报,第 39 卷,第 10 期 图 7 不同卸荷速率玉(a)、域(b)和芋(c)型应力强度因子随卸荷步变化规律 Fig. 7 Variation in stress intensity factors玉(a)、域(b) and 芋(c) of different unloading velocities along with unloading steps [7] Zhuang X Y, Chun J W, Zhu H H. A comparative study on un鄄 filled and filled crack propagation for rock鄄like brittle material. Theor Appl Fract Mech, 2014, 72: 110 [8] Yu T T. The extended finite element method (XFEM) for discon鄄 tinuous rock masses. Eng Computation, 2011, 28(3): 340 [9] Deb D, Das K C. Extended finite element method for the analysis of discontinuities in rock masses. Geotech Geol Eng, 2010, 28 (5): 643 [10] Belytschko T, Black T. Elastic crack growth in finite elements with minimal remeshing. Int J Num Method Eng, 1999, 45(5): 601 [11] Moes N, Dolbow J, Belytschko T. A finite element method for crack growth without remeshing. Int J Num Method Eng, 1999, 46(1): 131 [12] SIMULIA. Abaqus 6郾 14 Documentation. [ EB/ OL ]. http: / / wufengyun. com:888 / . 2015 [13] Huang D, Huang R Q. Physical model test on deformation failure and crack propagation evolvement of fissured rocks under unloa鄄 ding. Chin J Rock Mech Eng, 2010, 29(3): 502 (黄达, 黄润秋. 卸荷条件下裂隙岩体变形破坏及裂纹扩展演化 的物理模型试验. 岩石力学与工程学报, 2010, 29(3): 502) [14] Xu Z L. Elastic Mechanics Biref Tutorial. 4th Ed. Beijing: Higher Education Press, 2013 (徐芝纶. 弹性力学简明教程. 4 版. 北京: 高等教育出版 社, 2013) [15] Ayhan A O. Mixed mode stress intensity factors for deflected and inclined corner cracks in finite鄄thickness plates. Int J Fatigue, 2007, 29(2): 305 ·1476·