Influence of unit cell parameters of tetrachiral mechanical metamaterial on its effective properties

In the paper, we study mechanical behavior of a three-dimensional chiral metamaterial using numerical modeling. A feature structures is that during their uniaxial loading twisting observed along axis. rod composed 3 × 9 unit cells corresponding three orthogonal axes. The relative strain compression sample in simulation did not exceed 3.3%. was performed by finite element method threedimensional case. Original results on dependencies rotation angle and reaction rigidly fixed support parameters characterizing structure cell are presented this context. All dependencies, except one, nonlinear with portions large small changes.