Abstract
A model of the Leipholz column made of orthotropic layers is analyzed. Apart from reinforcing fibers, the layers contain thermoactive shape memory alloy fibers. A nonlinear equation of motion that takes into account moderate deflections of the column, as well as Brazier's cross-section flattening effect, is examined. The effect of the martensite transformation due to external cooling and heating on the system stability expressed in terms of the critical load is investigated. The temperature change is also shown to affect the characteristics of the column nonlinear response, because it can lead to conversion of subcritical bifurcation into a supercritical one.
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