Thanks, Wolfgang, I think reading some PDE knowledge materials would help me to solve the constitutive equation problems.
I try to read the create_point_source_vector() class in deal.ii https://www.dealii.org/9.2.0/doxygen/deal.II/namespaceVectorTools.html#ac4e531baa71a5183079fd2083aa7d723 But I am still confused as to how I should add some load? Attach my code. template <int dim> void create_point_source_vector(const std::vector<Point<dim>>& points, std::vector<Tensor<1, dim>>& values) { Point<dim> point_1; point_1(0) = 0.5; point_1(1) = 0.3; values[point_1][1] = -10.0; } It seems to be useless... 在2020年11月10日星期二 UTC+8 上午8:32:16<Wolfgang Bangerth> 写道： > > Nick, > > > If I want to modify the constitutive equation based on step-8, but I > can't > > understand the expression you described in step8, like this. > > > > [...] > > > > Which aspect of knowledge should I learn if I want to modify the > constitutive > > equation. > > This is a question that goes beyond what we can provide here. You are in > essence saying that you don't know how to read a partial differential > equation. I would suggest you take a course on PDEs (or read a book on the > theory of partial differential equations) or at least a course on > mechanics > that covers how these equations are derived and what they mean. > > If your goal is modeling of materials, there are many books on solid > mechanics. > > > > Or can I export the .inp file in Abaqus modeling and directly calculate > it in > > Deal.ii? Does Deal.ii support such operations? > > It's not that easy, but it's also not going to be useful to you: If you > don't > understand how constitutive equations are posed and what the different > pieces > mean, how do you expect to find out whether something is correct or not > *even > if you could magically import them into deal.II*? Doing "something" with a > code (whether that is ABAQUS or deal.II) doesn't mean that what you get is > correct or useful -- being able to tell whether something is correct or > useful > requires understanding, which requires sufficient theoretical background. > > Best > W. > > -- > ------------------------------------------------------------------------ > Wolfgang Bangerth email: bang...@colostate.edu > www: http://www.math.colostate.edu/~bangerth/ > > -- The deal.II project is located at http://www.dealii.org/ For mailing list/forum options, see https://groups.google.com/d/forum/dealii?hl=en --- You received this message because you are subscribed to the Google Groups "deal.II User Group" group. To unsubscribe from this group and stop receiving emails from it, send an email to dealii+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/dealii/f88ecde1-7cc1-4679-80f7-0235a5f7180an%40googlegroups.com.
