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本文阐明了在零件截面上同时作用有二维应力(如机器中转轴受到弯曲和扭转复合力)的安全系数计算时,如何正确应用第三强度理论,将承受弯曲和扭转联合静载荷的强度破坏条件,推广到承受对称循环交变应力的弯曲和扭转联合作用的强度破坏条件中,并找出了受弯曲和扭转复合交变应力零件的工作安全系数计算公式。
This paper illustrates how to properly apply the third strength theory to the calculation of the safety factor of simultaneous two-dimensional stress on the cross-section of the part (such as bending and twisting composite forces in the shaft of the machine), and to destroy the strength under bending and twisting combined with static load Conditions are extended to withstand the strength failure conditions of the combined action of bending and torsion of alternating cyclic stress in symmetry and find out the working safety factor formula of composite parts subjected to bending and torsion.