2D triangular anti-trichiral structures and auxetic stents with symmetric shrinkage behavior and high energy absorption

摘要: Abstract In this study, 2D triangular anti-trichiral structures and auxetic stents, under compression, were introduced. The cores of the equilateral triangles. deformation mechanisms in based on rotation triangles bending ligaments. A parametric study was carried out to investigate dependence Poisson's ratio triangle edge lengths. most auxeticity, with values υ y z  = −0.55  = −1.6, obtained structure which lengths considered 13 mm. Next, stents aims uniform shrinkage behaviors as well high energy absorption For purpose, distributed cylindrical surfaces along peripheral longitudinal directions. Under stent 15mm possessed behavior, measured x  = −2.2  = −2.19. Finally, comparisons between conventional performed. It observed that lateral displacements, twice three times respectively.