長さの方向に二円孔を有する帯板の引張りについて-光弾性実験

抄録

In this paper, the stress distributions and factors of the stress concentrations of the flat bars having two circular holes of equal radii on the neutral axis in a field of pure tension were investigated photoelastically. Test pieces were made of phenolite and epoxy resin and the radii of two holes were made in three different kinds and the distance between them were made in six different kinds. The relations of the maximum stresses and a/b and a/c were explained, where a is the radius of holes, b is the constant breadth of bar, and c is the distance of the center of two holes. The maximum stresses of the flat bars having two circular holes were all lower than those of the flat bars having one hole of same radius.