STRESSESINBENDING P Pure bending: A B Deformation of some portion of the ●● beam in which there are only bending moment and no shearing stress is called 70 pure bending. Such as portion AB M、 P 纯弯变形几何关系Deformation of some portion of the beam in which there are only bending moment and no shearing stress is called pure bending. Such as portion AB. a P P a A B Q M x x Pure Bending: P P Pa