Fig. 5: Discrete model for odd micropolar beam.
From: Realization of active metamaterials with odd micropolar elasticity
a A discrete model of a Timeoshenko beam consists of a central mass m with moment of inertial J, a Hookean spring of spring constant kμ and a torsional spring of spring constant κ, Band lattice spacing L. b The unit cell is described by the height of the mass hi and the angle φi of the black connecting rod. c, d The odd micropolar beam has an internal feedback P that senses the angle change of the torsional spring and actuates additional tension in the Hookean spring. The control loop is unidirectional: stretching or compressing the Hookean spring does not affect the torsional spring.
