THE LARGE-SCALE CRUMPLING OF THIN CYLINDRICAL COLUMNS

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Abstract
When a very thin metal tube of cylindrical section is compressed between parallel platens, its walls tend to buckle in and out to form a diamond pattern of deformation around the tube. This paper considers the subsequent behaviour of such tubes when the compression is continued to cause large-scale crumpling of the tube walls. The nature and mode of this crumpling is examined in the light of experimental results and, guided by an approximate theory for an idealized case, an empirical expression for the load required to effect the crumpling is obtained.

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