| 摘要 |
<p>PURPOSE:To enhance torsional fatigue strength of a fiber reinforced plastic (FRP) cylindrical pipe, by forming the FRP cylindrical pipe, having metallic sleeves, to be laminated so that the fiber material in its plastic may be wound at an angle of + or -25 deg.-+ or -35 deg. with respect to an axial direction of the pipe. CONSTITUTION:A fiber reinforced plastic (FRP) cylindrical pipe 1 is laminated on the periphery of a paper sleeve 2 and its both end metallic sleeves 3, 3. The metallic sleeve 3, providing on its internal surface a spline groove 3a, couples by a spline to a yoke 4 or the like. The sleeve 3, using an adhesive agent 5 to be applied onto its external surface, is adhesively mounted to the FRP cylindrical pipe 1. The cylindrical pipe 1 is formed by a fiber material so that it may be wound at an angle theta of + or -25 deg.-+ or -35 deg. with respect to an axial direction of the pipe. In this way, residual stress inside an FRP is reduced by equalizing a coefficient of thermal expansion of the FRP almost to that of metal so as to decrease tensile stress between the sleeve 3 and the cylindrical pipe 1 when they are molded to be cooled.</p> |
