A method of reducing the concentration of stress that occurs when joining two cylindrical component ends with a tube. Grooves are placed near the ends of the cylindrical components that alleviate the stress/strain felt by the cylindrical components when undergoing flex cycling. Metal materials such as Nitinol and stainless steel are often used in the construction of implantable medical devices. Permanertt implantable devices are required to survive under cyclical loading for millions and often times hundreds of millions of cycles. Stress raisers can be created in geometries with large and sharp or abrupt dimensional changes.La présente invention concerne un procédé de réduction de la concentration de contrainte qui apparaît lors de lassemblage de deux extrémités de composants cylindriques avec un tube. Des rainures sont pratiquées à proximité des extrémités des composants cylindriques, ce qui diminue la contrainte/tension subie par les composants cylindriques lorsquils sont soumis à un cycle de flexion.
