STRESSESINBENDING 2、 Study method There are only normal stresses in the section under plane bending-beam of pure bending (There is only M and no Q in the cross section) There are shearing stresses in the section under plane bending-beam of transverse bending. (There areQ and m in the cross section) Such as: P Longitudinal plane of symmetrThere are only normal stresses in the section under plane bending beam of pure bending (There is only M and no Q in the cross section). There are shearing stresses in the section under plane bending beam of transverse bending. (There are Q and M in the cross section). 2、Study method Longitudinal plane of symmetry Such as： P1 P2