轴肩圆角拉弯时应力集中系数的最新研究结果

Updated Stress Concentration Factors for Filleted Shafts in Bending and Tension

过去出版物中弹性应力集中系数在受弯状态低估了21％，受拉状态低估了40％．对轴肩圆角应力集中系数所列的图表是根据对其它类似几何形状的分析结果提供的近似值。经过对含各种尺寸的轴肩圆角模型进行拉弯状态下详细的有限元分析，在三方面得出有用结论：直修正弹性应力集中系数；2修正冯·密歇斯等效应力集中系数；3圆角处最大应力位置。最新结果以人们熟悉的图形形式表示．而由曲线回归出的经验公式适用于设计中的数字计算。

According to the article from the Journalof Mechanical Design published elastic stress concentration factors are shown to underestimate stresses in the root of a shoulder filleted shaft in bending by as much as 21percent, and in tension by as much as forty percent. In this study, detailed finite element analyses were performed over a wide range of filleted shaftgeometries to define three useful relations for bending and tension loading.