习题解答 在A处受到的剪应力为 m 78.6 =50MPa 2WTD3πx(002)3 16 16 所以在A处单元体的应力图为 50MPa 50MPa 50MPa 50MPa 50MPa 50MPa在A处受到的剪应力为： 50MPa 16 (0.02) 78.6 16 D m 2W m 3 3 2 1 =  =   = = 所以在A处单元体的应力图为： 50MPa 50MPa 50MPa 50MPa 50MPa 50MPa 习题解答