Wang Yuan,
I am using extended finite element method to do crack expansion. I have a
question, can I increase the degree of freedom for the nodes designated around
the crack in Deal?
Not easily. deal.II enumerates degrees of freedom based on the finite element
used on a cell, so if you want to have extra degrees of freedom, you need to
describe that by using a different element on that cell (using the
hp-framework, in the same way as step-46 for example).
Meanwhile, another question is can I assign different
numbers of Gaussian integral points to different elements? Thank you for your
help!
Yes! You can use a hp::QCollection together with hp::FEValues. Or you can do
it by hand: You create multiple quadrature rules and corresponding FEValues
objects, and then you choose which one is appropriate when you are on a
concrete cell.
Best
W.
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Wolfgang Bangerth email: bange...@colostate.edu
www: http://www.math.colostate.edu/~bangerth/
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