异面压缩下六边形铝蜂窝平均塑性坍塌应力研究

In order to study the mean plastic crushing stress of aluminum honeycombs under quasi-static out-of-plane compression, based on the simplified basic folding unit theory, a single complete aluminum honeycomb hexagonal element is taken as the object of study. According to the energy conservation law, the energy of forming a basic folding unit equals to the sum of buckling energy and membrane energy. Based on the law, it is assumed that the aluminum honeycomb material obeys the Tresca yield criterion or the Mises yield criterion, and two theoretical formulae are carried out, which can calculate the mean plastic crushing stress of the aluminum honeycombs under quasi-static out-of-plane compression. The experimental data verify the correctness of the theory. The formulae proposed in this paper can provide some engineering guidances for studying the out-of-plane compression performance of aluminum honeycomb.