Abstract
The purpose of this study is to investigate the physical properties of catheter, which made of soft nylon resin and is reinforced with thin stainless wires so called braid. In our previous study, the buckling tests under uni-axial loading have been carried out with various deformation speeds, and the relation between the phenomenon of stress relaxation and the buckling load has been revealed. In this paper, the buckling load obtained under initial torsion is estimated by changing the speeds of the axial displacement, and the relation between the buckling region and the stress relaxation is examined.
