Structural Optimization of the Novel 3D Graded Axisymmetric Chiral Auxetic Structure

A recently introduced novel 3D auxetic axisymmetric chiral structure (ACS) with a periodic exhibits nonuniform stress distribution, stresses concentrated primarily on the inner part of structure. The structural optimization one unit cell validated computational model is conducted to determine optimal geometrical configuration cell, considering target strain energy density as objective function. results are then used build parametric whole ACS structure, where areas significantly different strut thicknesses defined separate section control thickness struts discretely. optimized. This in new, spatially graded stiffer providing 4.25 times higher absorption capability than regular ACS, highest specific (SEA) values strut-based metamaterial class and thus ideal for future crash applications.