Uniform tension was applied to 1-in. thick 6-in. wide plates which contained edge cracks normal to the direction of loading. After stress freezing, slices normal to the plane of the crack were cut and analysed. The results were compared with theoretical solutions by Westergaard (1)‡ and Williams (2). In general, both solutions were found satisfactory, but the hydrostatic tension predicted for the line of the crack was not found. The slight inequality of the stresses changed the directions of the principal stresses radically near the line of the crack.
Get full access to this article
View all access options for this article.
References
1.
WestergaardH. M.1939J. appl. Mech., vol. 6, p. A-49, ‘Bearing pressures and cracks’.
2.
WilliamsM. L.1957J. appl. Mech., vol. 24, p. 109, ‘On the stress distribution at the base of a stationary crack’.
3.
PostD.1954Proc. Soc. exp. Stress Anal., vol. 12, No. 1, p. 99, ‘Photoelastic stress analysis for an edge crack in a tensile field’.
4.
AndrewsE. H.1961Proc. Phys. Soc., vol. 77, part 2, p. 483, ‘Stresses at a crack in an elastomer’.
5.
FesslerH.RobertsE. A.1961‘Bending stresses in a shaft with a transverse hole’, Selected papers on stress analysis presented at the Institute of Physics Stress Analysis Group Conference, Delft 1959, first edition, p. 45 (Chapman and Hall).
6.
den HartogJ. P.1952‘Advanced strength of materials’, first edition, p. 197 (Chapman and Hall).
7.
FrochtM. M.1946‘Photoelasticity’, first edition, p. 262 (John Wiley and Sons).
