The situation I am looking at involves a round beam that goes through two rigid round holes (top beam in the image). The holes are meant to fix the beam. The beam length is between 1m and 2m and the diameter is less than 2 cm. If the beam was attached at the end with only one holes fixing it I would ignore the shear stress but in this case I am concerned about the region in between the two supporting holes. Is it ok to ignore shear stress in the beam? When doing bending calculations would it be a bad approximation if I were to separate the beam as shown in the bottom part of the image?