In this paper, we revisit the formability of tube expansion by single point incremental forming to account for material strain hardening and non-proportional loading paths that were not taken into consideration in a previously published analytical model process built upon rigid perfectly plastic material. The objective is provide new insight on reason why critical strains at failure are far sup...

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, cause...