Endochronic Analysis for Viscoplastic Collapse of a Thin-Walled Tube under Combined Bending and External Pressure

摘要: In this study, we employ the ordinary-differential constitutive equations of endochronic theory to investigate collapse a thin-walled tube subjected bending. A virtual work approach is used formulate problem, which results in set nonlinear algebraic that are numerically solved. Experimental data on 6061-T6 aluminum alloy under cyclic bending and 304 stainless steel combined external pressure found previous literature compared with theoretical simulation. The experimental good agreement. Finally, by using rate-sensitivity function intrinsic time measure theory, analysis extended viscoplastic Owing hardening metal for faster curvature rate, magnitude limit moment, ovalization cross section value at theoretically demonstrated have increased.