# On the membrane approximation for thin elastic shells in the hyperbolic case.

• Volume: 6, Issue: 2, page 311-331
• ISSN: 1139-1138

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## Abstract

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We consider the variational formulation of the problem of elastic shells in the membrane approximation, when the medium surface is hyperbolic. It appears that the corresponding bilinear form behaves as some kind of two-dimensional elasticity without shear rigidity. This amounts to saying that the membrane behaves rather as a net made of elastic strings disposed along the asymptotic curves of the surface than as an elastic two-dimensional medium. The mathematical and physical reasons of this behavior are explained and consequences are thrown concerning the admissible applied forces and the behavior of the solutions. The normal component of the displacement is somewhat non smooth. Our approach gives a description of the problem in somewhat general situations concerning the boundary conditions, whereas the classical approach in terms of a hyperbolic system of total order 4 with 2 double characteristics (the asymptotic lines) only works in the case when the boundary conditions lead to either Cauchy or Goursat problems.

## How to cite

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Sánchez-Palencia, E.. "On the membrane approximation for thin elastic shells in the hyperbolic case.." Revista Matemática de la Universidad Complutense de Madrid 6.2 (1993): 311-331. <http://eudml.org/doc/43821>.

@article{Sánchez1993,
abstract = {We consider the variational formulation of the problem of elastic shells in the membrane approximation, when the medium surface is hyperbolic. It appears that the corresponding bilinear form behaves as some kind of two-dimensional elasticity without shear rigidity. This amounts to saying that the membrane behaves rather as a net made of elastic strings disposed along the asymptotic curves of the surface than as an elastic two-dimensional medium. The mathematical and physical reasons of this behavior are explained and consequences are thrown concerning the admissible applied forces and the behavior of the solutions. The normal component of the displacement is somewhat non smooth. Our approach gives a description of the problem in somewhat general situations concerning the boundary conditions, whereas the classical approach in terms of a hyperbolic system of total order 4 with 2 double characteristics (the asymptotic lines) only works in the case when the boundary conditions lead to either Cauchy or Goursat problems.},
author = {Sánchez-Palencia, E.},
keywords = {Estructuras laminares; Cubiertas y tejados; Elasticidad; Estudio físico matemático; Membranas; Cauchy problem; Goursat problem; Wege's sequences; shear rigidity; limit behavior; middle surface; general boundary conditions; flexion terms},
language = {eng},
number = {2},
pages = {311-331},
title = {On the membrane approximation for thin elastic shells in the hyperbolic case.},
url = {http://eudml.org/doc/43821},
volume = {6},
year = {1993},
}

TY - JOUR
AU - Sánchez-Palencia, E.
TI - On the membrane approximation for thin elastic shells in the hyperbolic case.
PY - 1993
VL - 6
IS - 2
SP - 311
EP - 331
AB - We consider the variational formulation of the problem of elastic shells in the membrane approximation, when the medium surface is hyperbolic. It appears that the corresponding bilinear form behaves as some kind of two-dimensional elasticity without shear rigidity. This amounts to saying that the membrane behaves rather as a net made of elastic strings disposed along the asymptotic curves of the surface than as an elastic two-dimensional medium. The mathematical and physical reasons of this behavior are explained and consequences are thrown concerning the admissible applied forces and the behavior of the solutions. The normal component of the displacement is somewhat non smooth. Our approach gives a description of the problem in somewhat general situations concerning the boundary conditions, whereas the classical approach in terms of a hyperbolic system of total order 4 with 2 double characteristics (the asymptotic lines) only works in the case when the boundary conditions lead to either Cauchy or Goursat problems.
LA - eng
KW - Estructuras laminares; Cubiertas y tejados; Elasticidad; Estudio físico matemático; Membranas; Cauchy problem; Goursat problem; Wege's sequences; shear rigidity; limit behavior; middle surface; general boundary conditions; flexion terms
UR - http://eudml.org/doc/43821
ER -

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