From: bangerth Date: Mon, 25 Apr 2011 03:40:01 +0000 (+0000) Subject: Improve the wording of the note. X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ba398d28dc7f0bb339bff5b290bc84996ebc0f95;p=dealii-svn.git Improve the wording of the note. git-svn-id: https://svn.dealii.org/trunk@23652 0785d39b-7218-0410-832d-ea1e28bc413d --- diff --git a/deal.II/examples/step-8/doc/intro.dox b/deal.II/examples/step-8/doc/intro.dox index 0e454a55d0..9c04cb3435 100644 --- a/deal.II/examples/step-8/doc/intro.dox +++ b/deal.II/examples/step-8/doc/intro.dox @@ -92,9 +92,15 @@ in the C++ source, over $\{0,1,2\}$). However, as is, the program runs in 2d, and while the equations above also make mathematical sense in that case, they would only describe a truly two-dimensional solid. In particular, they are not the appropriate description of an $x-y$ cross-section of a body infinite in -the $z$ direction, as many other two-dimensional equations are. For a -description of such cases, see for example the wikipedia article on antiplane shear. +the $z$ direction; this is in contrast to many other two-dimensional equations +that can be obtained by assuming that the body has infinite extent in +$z$-direction and that the solution function does not depend on the $z$ +coordinate. On the other hand, there are equations for two-dimensional models +of elasticity; see for example the wikipedia article on plane +strain, antiplane shear and plan stress. But let's get back to the original problem. How do we assemble the matrix for such an equation? A very long answer