Crushing features of the triangular unit origami structure foldcore

The foldcore of an origami structure made up of rigid triangular units is suggested. This foldcore has two stable states: contraction and expansion. The suggested foldcore's peak stress, average stress, and densification strain were numerically analyzed at different cutting heights and varied parameters n, and the damage modes were analyzed. Finally, the impact of strain rate on the proposed foldcore's structural response and energy absorption capacity is investigated. The contraction stable state foldcore with a cutting 1/5 height was discovered to have the best energy absorption capacity. Increasing n improves its energy absorption performance, but decreases its dense strain.

Automated summary

This study proposes a foldcore consisting of rigid triangular units. The peak stress, average stress, and densification strain of the suggested foldcore are analyzed numerically at different cutting heights and varied parameters n. The damage modes are also analyzed. Additionally, the effect of strain rate on the foldcore's structural response and energy absorption capacity is investigated. The findings show that the contraction stable state foldcore with a cutting height of 1/5 has the best energy absorption capacity, while increasing parameter n improves the energy absorption performance.