an:01437125
Zbl 0989.74047
Gerard, Patrick; Sanchez-Palencia, Evariste
Sensitivity phenomena for certain thin elastic shells with edges
EN
Math. Methods Appl. Sci. 23, No. 4, 379-399 (2000).
00063210
2000
j
74K25 74G10 35B40 35Q72
sensitivity; thin elastic shells; edges; elliptic-hyperbolic shell; finite element approximation; distribution space; energy space
Summary: We consider two kinds of shells which are sensitive, i.e. they are geometrically rigid and, as the thickness \(\varepsilon\) tends to zero, the limit problem is unstable in the sense that there are very smooth loadings (belonging to the space \({\mathcal D}\) of test functions of distributions) such that the corresponding solutions go out of the energy space. The first situation occurs when there is an edge and the middle surface is elliptic on both sides of it. The second situation occurs when there is an edge \(\Gamma_0\), the surface is respectively elliptic and hyperbolic on both sides of it, and the `determination domain' in the hyperbolic region issued from \(\Gamma_0\) intersects another edge \(\Gamma_1\).