CHAPTER 4. FINITE ELEMENT MODELLING 4.1 FINITE ELEMENT METHOD 4.2 APPLICATION OF GALERKIN METHOD 4.2.1 Explicit Fonnulation 4.2.2 Implicit Fonnulation 4.2.3 Constitutive Relationships 4.3 FISSURED POROUS MEDIA REPRESENTATION 4.3.1 Isoparametric Elements 4.3.2 Element Stiffness Matrix 4.4 DISCRETE FRACTURE REPRESENTATION 4.4.1 Joint Elements 4.4.2 Thin Elements 4.4.3 Thin Flow Element and the Problem of ID-Conditioning 77 4.4.4 Relationship Between Input Parameters in Joint and Thin Elements 96

more »

... .4.5 Coupled Thin Element vs. Coupled Joint Element 99 4.5 TIME STEP CONSTRAINTS 101 4.5.1 General 102 4.5.2 Lower Bound for Time Step Magnitude 103 4.5.3 Guidelines for the Selection of Time Step 108 CHAPTERS. VERIFICATION AND APPLICATION 5.1 COMPUTER CODE 5.