40. 考慮一薄壁圓筒壓力槽容器,其內徑 d = 400 mm,槽壁厚度 t = 8 mm,壓力容器槽內氣體壓力為 p = 800 KPa,則該容器槽內壁所承受的最大剪應力為多少?(A)5.2 MPa(B)10.4 MPa(C)15.6 MPa(D)20.8 MPa