Viscoplastic collapse of titanium alloy tubes under cyclic bending

Experimental and Theoretical Evaluations of the Effect between Diameter-to-Thickness Ratio and Curvature-Rate on the Stability of Circular Tubes under Cyclic Bending

“…The output from either the curvature-ovalization measurement apparatus or from the load-cell can be selected as feedback for curvature or moment control, respectively. A detailed description of such a bending device can be found in literature (Kyriakides and Shaw (4) ; Corona and Kyriakides (5) ; Lee and Pan (1) ; Lee et al (2) ). Figure 2 shows a schematic drawing of the COMA.…”

“…In addition, a formulation among the magnitude of the applied curvature, curvature-rate and the number of cycles to produce buckling was introduced. Lee and Pan (1) investigated the viscoplastic response and collapse of the titanium alloy tubes subjected to cyclic bending. They modified the theoretical formulation, which was proposed by Pan and Her (11) , so that it can be used for simulating the relationship between the controlled curvature and number of cycles to produce buckling for titanium alloy tubes under cyclic bending with different curvaturerates.…”

“…The curvature-ovalization measurement apparatus, designed by Pan, et al (13) , was used for conducting the curvature-controlled cyclic bending test with different curvature-rates. Finally, a theoretical formulation, which was combined and modified the formulations obtained by Lee and Pan (1) and Lee, et al (2) , was proposed so that it can be used for simulating the relationship between the controlled curvature and the number of cycles to produce buckling for circular tubes with different D/t ratios subjected to cyclic bending with different curvaturerates. The theoretical simulation was compared with the experimental data.…”

Experimental and Theoretical Investigation of the Response and Collapse of 316L Stainless Steel Tubes Subjected to Cyclic Bending

“…The tubes used by them were the same as that used by Pan et al (1) Pan and Her (8) investigated the response and stability of SUS 304 stainless steel tubes subjected to cyclic bending with different curvature-rates. Hsu et al (9) investigated the elastoplastic response and stability of titanium alloy tubes subjected cyclic bending and Lee and Pan (10) investigated the viscoplastic response and stability of titanium alloy tubes subjected cyclic bending. Lee et al (11) discussed the influence of the diameter-tothickness ratio to the response and stability of SUS 304 stainless steel tubes subjected to symmetrical cyclic bending.…”

“…(1) ; Pan and Her (8) ; Lee et al (10) ) was used to conduct the tests. The curvatureovalization measurement apparatus, designed by Pan et al (1) , was used to conduct the curvature-symmetric cyclic bending test.…”