LAUSR

The main focus in the development of metamaterials is on the design of multiscale structures, rather than on the chemical composition and properties of the base materials. In this work, a mechanical metamaterial is studied by mathematical modeling and computer simulations. A tetrachiral metamaterial structure is chosen due to its specific rotational behavior under uniaxial loading. Special attention is paid to the efficient use of the base material in the design of metamaterial samples. Two types of connection between unit cells in a macrobody are discussed: adjoining and overlapping. It is shown that a much less amount of the base material is used in 1D, 2D, and 3D samples consisting of overlapping cells. Numerical calculations of uniaxial loading of a system of two adjoining and overlapping cells showed that the adjoining cells act on each other, their contacting walls rotate in opposite directions due to chiral structure, and the sample is twisted. The overlapping cells have one common wall that rotates in one direction only, leading to a more pronounced twisting of the sample.