DRIVING TRACTION ON PHASE-BOUNDARY INTERFACES IN SOLIDS WITH BOUNDARYELEMENTS

A method of computing driving tractions for phase transformations is p resented. The driving traction calculation requires evaluating the jum p in the displacement gradient and the average stress acting across th e interface. A bimaterial Green's function is used in a boundary eleme nt formulation for the calculation. The Green's function satisfies all interface boundary conditions for the bimaterial providing an efficie nt formulation for evaluating the necessary jump and average interface terms. We derive a boundary integral equation for calculating the dri ving traction and apply the developed numerical tool to driving tracti on calculations in copper-aluminum-nickel.