Finite element method 2 Mixed finite element methods Mixed finite elements 2 Algebra 1 Algebraic system 1 Computational mechanics 1 Crossing fracture 1 Crossing fractures 1 Deformation 1 Elliptic interface problems 1 Finite-element schemes 1 Fracture 1 Fractured media 1 Friction 1 Frictional contact 1 Frictional shear 1 Immersed finite element 1 Immersed finite elements 1 Interface problem 1 Interface problems 1 Lagrange multipliers 1 Loading types 1 Low order 1 Mesh generation 1 Mixed finite element 1 Mixed-finite element method 1 Mode II 1 Numerical methods 1 Raviart-Thomas 1 Raviart-Thomas mixed finite elements 1