圆轴扭转时横截面上的切应力分布: 实心圆轴: 空心圆轴: T T W max W P max max圆轴扭转时横截面上的切应力分布： T Wp T  max = Wp T  max = Wp T  max = 实心圆轴： T Wp T = max  Wp T = max  Wp T = max  空心圆轴：