
A thin rectangular sheet with a central hole subject to tensile loading.
Problem Type:
Plane problem of stress analysis (plane stress formulation).
Geometry:
Plate thickness 5 mm
Given:
Young's modulus E = 207000 N/mm^{2};
Poisson's ratio ν = 0.3.
The uniform tensile loading (40 N/mm^{2}) is applied to the bottom edge of the structure.
Problem:
Determine the concentration factor due to presence of the central opening.
Solution:
Due to mirror symmetry one quarter of the structure is presented, and internal boundaries are
restrained in X and Y directions respectively.
The concentration factor may be obtained from the loading stress (40 N/mm^{2}) and the maximum computed stress (146 N/mm^{2}) as
k = 146 / 40 = 3.65.
See the Stres1.pbm problem in the Examples folder.