Abstarct: In this research, ratcheting and softening behavior of stainless steel SS316L cylindrical shell under cyclic bending and cyclic combined loading (bending-torsion) are studied. Cyclic bending was under force-control and displacement-control. Combined loading was under displacement-control. Experimental tests were performed using an INSTRON 8802 servo-hydraulic machine. Under force-control loading with non-zero mean force, plastic strain was accumulated in continuous cycles, so called phenomena ratcheting. Under displacement-control loading, softening behavior is observed and the rate of softening became higher by using of the higher force amplitude. The numerical analysis was carried out by ABAQUS software and nonlinear isotropic/kinematic hardening was compared with isotropic hardening and observed the nonlinear isotropic/ kinematic hardening model simulates the softening and ratcheting behavior of cylindrical shells under cyclic bending accurately.