Effects of boundary conditions on the finite plate with cracked circular hole are studied by modified mapping collocation method. The stress intensity factor, and stress and displacement distributions are observed for uniform stress boundary condition and uniform displacement boundary condition.
When the loaded surface is near to circular hole, it is found that the stress intensity factor for uniform stress boundary condition is greater than that for uniform displacement boundary condition for the same geometry. The difference in stress intensity factors for the two boundary conditions increases with the increase of crack length. When the loaded surface is far from circular hole, the stress intensity factors for the two boundary conditions approach each other.
When the crack length is small, the circular hole boundary is subjected to tension in part and compression in part. But when the crack length is large, the whole circular hole boundary is subjected to compression, and in uniform stress boundary condition the hole is subjected to large compression.
