Abstract
Nowadays, more bio-inspired structures were proposed and adapted in structural designs to improve their energy absorbing performance. In this paper, a bio-inspired constituent element (BCE) consisting of a hollow cylindrical tube with four panels was studied. Quasi-static tests were conducted to evaluate its energy-absorbing performance using specimens with a thin-walled square tube. A FE model was developed and validated in favorable agreement with the experimental data. Using the FE model, a parametric study of the energy absorbing capability and deformed pattern of the BCE was conducted. The specific energy absorption (SEA) of the BCE is higher than that of traditional angle elements and significantly affected by the wall thickness, radius of cylindrical tube and number of intersecting panels. Finally, analytical (or theoretical) formulae for estimating the mean crushing force of the BCE was derived and correlated favorably with the experimental data.
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