Abstract Appling the SAP91 software developed by Algor，the paper computed the stress con-centration factors for shoulder fillets in the stepped shafts in tension．In the main，the computing results are identica1 with the results of the photoelastic tests made by above scholars．Our resuits show that the shaft’s fillet radius can remarkably affect the stress concentration effect，and that the different loading modes or shaft’s lengths can also result in the different factors when 0ther parameters are fixed．
QI Xiu-Mei, GAO Chuang-Kuan. Theoretical study on stress concentration factors of shafted parts. Chinese Journal of Engineering Design, 2002, 9(1): 7-11.
