SOME ASPECTS OF THE EFFECT OF PLASTICITY ON THE AUXETIC BEHAVIOR

Abstract

The paper studies the effect of plasticity on the materials with negative Poisson’s ratio. The macroscopic and the microscopic elasto-plastic behavior of a laminated aluminium composite plate reinforced with auxetic layers are investigated. The results show that auxetic effect persists and becomes stronger with increasing of the shear stress level. It was also shown that the effect of plasticity on auxeticity fades with the expansion of the plastic zone.