Stability of Heated Elastic Plastic Column

by Li-Chung Tao,
Atle Gjelsvik,

Serial Information: Journal of the Engineering Mechanics Division, 1969, Vol. 95, Issue 5, Pg. 1169-1188

Document Type: Journal Paper


It is shown analytically and confirmed experimentally that the buckling strength of a clamped column can be significantly reduced by partial yielding caused by a transverse temperature gradient. The behavior of the column is of the Shanley type. An initially straight column can begin to bend at any load between two characteristic loads. The classical buckling load lies between the characteristic loads. Below it a load deflection curve initially rises, and above it falls. For a real column the lowest critical load is the most significant. The maximum load the column can carry (smaller than the classical buckling load) when it starts to buckle at this load was determined numerically for some typical cases. From a design point of view the best value to use for a critical load is probably the lowest buckling load. This use of the lowest buckling load was confirmed by the experimental investigation which showed the maximum load the columns carried to group closely around this value.

Subject Headings: Critical loads | Maximum loads | Columns | Elastoplasticity | Elastic analysis | Thermal analysis | Structural strength | Transverse strength

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