ENDODONTIC TREATMENT CONCRETO COUPLING FINITE ELEMENT ITZ FINITE ELEMENT NONLINEAR ANALYSIS MESH FRAGMENTATION TECHNIQUE HSC FIBER REINFORCED CONCRETE REINFORCED CONCRETE CYCLIC BEHAVIOR STRUCTURAL DYNAMICS CONCRETE DAM POST-AND-CORE CRACK PROPAGATION PROCESS INTERFACE FINITE ELEMENTS ROOT FRACTURE DYNAMIC ANALYSIS SIZE-SCALE EFFECTS STRAIN LOCALIZATION DANO TOUGHNESS.