Abstract
The purpose of this study is to investigate physical property of the catheter, which made of soft nylon resin and is reinforced with thin stainless wires called braid. In our previous report, applying the step strain for tension and torsion with two-stages, we have been investigated the phenomenon of stress relaxation by changing the order of tension and torsion, and we have been examined the effect of these loading histories on the viscoelastic property. In this paper, the combined loading tests for bending and torsion are carried out, and we elucidate the viscoelastic property under the combined loading. Moreover, we try to formulate the numerical model for viscoelastic response based on these experimental results.
