Abstract

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.

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