畫出此單元體,將應(yīng)力標(biāo)在其上.Draw a view of this element with the stress placed thereon.在B處的單元體,彎曲應(yīng)力為零.The bending stress is zero for the element at B.現(xiàn)在從考察一無應(yīng)力物體中的圓球形單元體開始討論.We begin by considering a spherical element in an unstresse...