caa a22 4500 606223738 CHVBK 20210128101140.0 cr unu---uuuuu 210128e20150501xx s 000 0 eng 10.1007/s11204-015-9309-9 doi (NATIONALLICENCE)springer-10.1007/s11204-015-9309-9 Numerical Modelling of Hydraulic Fracturing in Rock Mass by Xfem [Elektronische Daten] [Luyang Shi, Tiantang Yu, Tinh Bui] A numerical model based on the extended finite element method (XFEM) is developed to serve this purpose. The present approach involves several features of an effective numerical tool in modelling hydraulic fracturing: the generalized shape functions are used in a cluster of nodes around the cracks, whereas the conventional finite element shape functionsare applied outside the cracks; the ramp function is introduced to remove the blending elements in the XFEM setting; and the contact conditions between crack faces are considered by combining the mortar method with the augmented Lagrange's method. This study assumes uniform water pressures at the crack faces. The effect of the water pressure on the fracture behaviours of cracks and the interaction between the hydraulic and natural fractures are analyzed. Numerical examples are presented and discussed to show that the water pressure acting on the crack faces has a significant influence on the stress and the deformation in the vicinity of the cracks, and the crack propagation path depends on the mechanical properties of rock mass and natural fracture faces, water pressure, insitu stresses, and relative positions of natural and hydraulic fractures. Springer Science+Business Media New York, 2015 Shi Luyang Hohai University, Nanjing, China aut Yu Tiantang Hohai University, Nanjing, China aut Bui Tinh Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo, Japan aut Soil Mechanics and Foundation Engineering Springer US; http://www.springer-ny.com 52/2(2015-05-01), 74-83 0038-0741 52:2<74 2015 52 11204 https://doi.org/10.1007/s11204-015-9309-9 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s11204-015-9309-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Shi Luyang Hohai University, Nanjing, China aut NATIONALLICENCE 700 1- Yu Tiantang Hohai University, Nanjing, China aut NATIONALLICENCE 700 1- Bui Tinh Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo, Japan aut NATIONALLICENCE 773 0- Soil Mechanics and Foundation Engineering Springer US; http://www.springer-ny.com 52/2(2015-05-01), 74-83 0038-0741 52:2<74 2015 52 11204