Plastic Flow Percolation Across A Microstructure With Pores

A method to estimate the yield surface of porous metals, by identifying evolution of local yield connectivity and the onset of local yield percolation across the microstructure from finite element analyses, is investigated The finite element analyses are used to model the types of pore morphologies that have been observed in porous metals. Linear superposition of basis deformation cases is used to generate arbitrary applied elastic biaxial deformation states used to estimate the yield surface, in place of more costly and time consuming nonlinear analyses. &