Response of sandwich columns under compression

In this section we study the response of a compressed column. The compression carried by the column is small relative to the buckling load of the column. We note that the corresponding static problem has been studied by El-Sayed, S. et al, 2002 using a variant of the UMAT model which incorporates an unloading phase of the cohesive material response. The present study uses the UEL model for the problem and the salient features of the static response are briefly summarized. Two cases are considered; the first one is that of a relatively stout column with relatively thick facing sheets and the second is that of a slender column having very thin facing sheets.

Case I