Anatomical machines Anatomical machines The anatomical machines (Italian: "macchine anatomiche") are a couple of anatomical models reproducing the human circulatory system, exposed in the Cappella Sansevero in Naples. Realised in the second half of the 18th century, they are built on top of a couple of human skeletons, a male and a female. The reproduction of the vessel system was realised with metal wire, wax and silk, but because of its richness in details, for a long time it was believed that it was of natural origin instead. The models were commissioned by Raimondo di Sangro, prince of Sansevero, and realised by
Hypoelastic material Hypoelastic material In continuum mechanics, a hypoelastic material is an elastic material that has a constitutive model independent of finite strain measures except in the linearized case. Hypoelastic material models are distinct from hyperelastic material models (or standard elasticity models) in that, except under special circumstances, they cannot be derived from a strain energy density function. A hypoelastic material can be rigorously defined as one that is modeled using a constitutive equation satisfying the following two criteria: 1. The Cauchy stress formula_1 at time formula_2 depends only on the order in which the body has occupied its past configurations, but