Unable to obtain expected results: 2D linear elastic steady problem

[fourlei07]

hi lulu,
I have been working with the "hard_constraints_discontinuous_func.py" and "soft_constraints.py" files for the 2D linear elastic steady problem. However, but I am unable to obtain consistent results when running the code on my computer.
For instance, when running "soft_constraints.py" and inspecting the output file for the inverse problem, "2D_elastic_static_variables.dat," I discovered that the values of E and nu were [-8.04e-01, 1.69e-01], which do not match the expected/accurate values.

[mitchelldaneker]

Hello,

Please see lines 159 and 160 of the code. The "2D_elastic_static_variables.dat" file does not directly output E and nu, instead it outputs a transformation of these predicted values. You can use the following equations to compute the true predicted values.

E = (tf.tanh(E_) + 1.0) * 3e5
nu = (tf.tanh(nu_) + 1.0) / 4

Please see section 2.4 of our paper if you have questions on why we use these transformations.