Continuum models for pantographic blocks with second gradient energies which are incomplete

We postulate a deformation energy for describing the mechanical behavior of so called pantographic blocks, that is bodies constituted by stacking N layers sheets. remark effect limited in plane sheets and therefore only second derivatives transverse displacements along fibers appear chosen energy. use this novel to predict blocks when subjected : (i) compression traction test, (ii) torsion, (iii) shear (iv) bending. A linearization shows one floppy mode addition rigid body motions, assuming perfect pivots, similar