The effects of material constants on the micropolar elastic honeycomb structure with negative Poisson's ratio using the finite element method

摘要

To investigate the relation between the Poisson's ratio of a re-entrant honeycomb structure by varying the micropolar material constants such as micropolar Young's modulus E_m, micropolar Poisson's ratio V_m, characteristic kngth l, coupling factor N, and micropolar elastic constants in accordance with the micropolar elastic restrictions, a 2-D triangular finite element formulation including an extra degree of freedom was derived on the basis of Eringen's micropolar elasticity theory by using a linear triangular ekment. The effects on the structural Poisson's ratio of the honeycomb structure are studied in detail.