Singularities of Parabolic Inhibited Shells

This chapter is devoted to hyperbolic shells, whose principal curvatures are of opposite sign. Consequently, at each point of the middle surface, there are two asymptotic directions. Concerning the singularities emerging when \(\varepsilon \searrow\) 0, some aspects are very similar to the case of parabolic shells. For instance, singularities along characteristics are more singular than the loading f3 (at least for the normal displacement u3) and propagate.