- nrefine=2 Number of uniform refinements starting from 1x2 base mesh.
- traction=.1 Far field traction (relative to Young's modulus).
- radius=.5 Cut-out radius.
- poisson=.3 Poisson's ratio, nonnegative and strictly smaller than 1/2.

hole radius exact up to L2 error 9.16e-17

project

projection type: lsqr

solve

solving 60 dof system to machine precision using arnoldi solver

residual decreased by 15.5 orders using 0 krylov vectors

solver returned with residual 1e-16

constrained 60/60 dofs, error 0.00e+00/area

optimize

constrained 12/120 dofs

optimum value 0.00e+00

optimize

solve

solving 18 dof system to machine precision using arnoldi solver

residual decreased by 16.0 orders using 0 krylov vectors

solver returned with residual 2e-17

constrained 30/120 dofs

optimum value 9.74e-08

solve

solving 90 dof system to machine precision using arnoldi solver

residual decreased by 15.5 orders using 0 krylov vectors

residual decreased by 0.1 orders using 1 krylov vectors

residual decreased by 0.1 orders using 2 krylov vectors

solver returned with residual 2e-16

loop _sample_X 88%

RuntimeWarning: singular matrix
In /home/docs/checkouts/readthedocs.org/user_builds/nutils/checkouts/latest/nutils/warnings.py:17

errors: L2=9.49e-05, H1=2.86e-03