空心轴： T 16T W2 xDi-as[] 16T 16×716.2 D≥j0-a)πx40x10×0-05 .=0.046m=46mm d2=0.5D2=23mm 两轴的横截面面积之比为： A2_D-d6462-232 =0.783 A d 452 空心轴： max 2 t 2 T W τ = [ ] 3 2 4 16 (1 ) T D πτ α ≥ − 2 2 d D = = 0.5 23mm 两轴的横截面面积之比为： 3 4 2 16 (1 ) T π α D = − ≤ [τ ] 3 6 4 16 716.2 0.046m 46mm π 40 10 (1 0.5 ) × = = = × × ×−