Strength Predictions of Plates in Uniaxial Compression

by Robert M. Korol, Asst. Prof.; Dept. of Civ. Engrg. and Engrg. Mechanics, McMaster Univ., Hamilton, Ontario, Canada,
Archibald N. Sherbourne, Prof. of Civ. Engrg. and Dean, Fac. of Engrg.; Univ. of Waterloo, Ontario, Canada,

Serial Information: Journal of the Structural Division, 1972, Vol. 98, Issue 9, Pg. 1965-1986

Document Type: Journal Paper

Abstract: The prediction of the ultimate load for rectangular plates is obtained from the intersection of an elastic postbuckling loading path and a rigid-plastic unloading path. The former expresses post-buckling stability and uniqueness, affected by membrane forces and imperfections at large transverse displacements; the latter, insensitive to imperfections, illustrates the reduction in plastic limit load carrying capacity with changes in geometry which occur in a plastic mechanism at large displacements. The ultimate load predicted by this method is shown to bound the true ultimate load of the plate obtainable by an incremental analysis; the resulting solution, while approximate only and applicable to a range of moderately thick plates, is considerably less cumbersome to obtain and estimates the capacity of the plate reasonably well.

Subject Headings: Ultimate loads | Load factors | Plates | Load bearing capacity | Post buckling | Displacement (mechanics) | Plastics |

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