轴肩过渡曲线设计及应力集中分析

Design and stress concentration analysis of shoulder transition curves

分析单曲率圆弧、双曲率圆弧、三曲率圆弧、椭圆和流线形等多种轴肩过渡曲线的设计方法,利用有限元软件Abaqus对这些曲线进行建模分析。对于单曲率圆弧,应力集中系数和应力集中角度随着过渡半径的增大而减小,但是应力集中系数减小的效果并不十分明显。流线形过渡曲线基本消除了应力集中,其应力集中系数仅为1.004。双曲率圆弧、三曲率圆弧和椭圆过渡曲线也都将应力集中系数降低到1.05以下,适于实际工程应用。

The design methods of single-radius, two-radii, three-radii, elliptical and streamline shoulder transition curves are analyzed and they are modeled by Abaqus. For single-radius shoulder transition curve, both the stress concentra- tion factor and the stress concentration angle decrease as the transition radius increases, but the decrease of the stress concen- tration factor is not significant. The stress concentration factor of the streamline shoulder transition curve is reduced to 1.004. Two-radii, three-radii and elliptical shoulder transition curves all make the stress concentration factor below 1.05 and they are suitable for engineering application.