Hi, Andriy and Yves and Konstantinos, I loaded two meshes, totally about 350000 elements.
I only added elasticity bricks: getfem::add_isotropic_linearized_elasticity_brick(model, mim_1, "u_1", "lambda_1", "mu_1"); getfem::add_isotropic_linearized_elasticity_brick(model, mim_2, "u_2", "lambda_2", "mu_2"); and four pointwise_constraints (two more each mesh): getfem::add_pointwise_constraints_with_multipliers(model,"u_1","point_1_1","point_1_1_unitx", "point_1_1_valuex"); getfem::add_pointwise_constraints_with_multipliers(model,"u_1","point_1_1","point_1_1_unity", "point_1_1_valuey"); getfem::add_pointwise_constraints_with_multipliers(model,"u_1","point_1_2","point_1_2_unitx", "point_1_2_valuex"); getfem::add_pointwise_constraints_with_multipliers(model,"u_1","point_1_2","point_1_2_unity", "point_1_2_valuey"); getfem::add_pointwise_constraints_with_multipliers(model,"u_2","point_2_1","point_2_1_unitx", "point_2_1_valuex"); getfem::add_pointwise_constraints_with_multipliers(model,"u_2","point_2_1","point_2_1_unity", "point_2_1_valuey"); getfem::add_pointwise_constraints_with_multipliers(model,"u_2","point_2_2","point_2_2_unitx", "point_2_2_valuex"); getfem::add_pointwise_constraints_with_multipliers(model,"u_2","point_2_2","point_2_2_unity", "point_2_2_valuey"); The values for the pointwise_constraints are simply the same as -1. This means the two meshes should just be translated parallelly by -1 in both x and y direction. My solver is gmm::iteration iter(1E-9, 1, 100); getfem::standard_solve(model, iter); But I get warning of not convergence: iter 0 residual 1 iter 500 residual 6.17288e-05 Level 2 Warning in getfem/getfem_model_solvers.h, line 127: gmres did not converge! I am quite sure that my mesh looks good and have no strange shape elements. When I use small simply meshes, the code runs ok. Could you please advise to me how to improve? Regards Zhenghuai Guo
