G030112 Study on Snap-through Behavior for Catheter subjected to Initial Torsion : Relation between snap-through behavior and deformation speed

Abstract

The purpose of this study is to investigate the physical property of catheter, which made of soft nylon resin and is reinforced with thin stainless wires. The buckling behavior under initial torsion has been examined by using short specimens, and the effect of stress relaxation on the buckling behavior has been revealed in our previous report. However, the snap-through phenomenon occurs when using relatively long specimens. So, in this report, buckling tests under initial torsion are carried out by changing the initial twisting angles and the length of specimens variously. Especially, performing the experiments with different axial displacement speed, the relation between the snap-through phenomenon and the visco-elastic behavior are investigated.