Adjusting residual stresses by flexible stress superposition in incremental sheet metal forming

Abstract Process-induced residual stresses significantly influence the mechanical properties of a formed component. A polymer pad is used as flexible die in two-point incremental forming to induce compressive component during process. Experimental and numerical results illustrate stress superposition on properties. It shown that active support, using geometry-independent polyurethane die, causes beneficial tool side compared tensile induced by single-point process without such supporting die.