Disable relaxation for RBC-RBC. It's harmful.

Author: lxmota

examples/nonoverlap/dynamic-same-step/cuboids-robin-robin/cuboids-predictor.yaml

@@ -9,5 +9,4 @@ minimum iterations: 1
 maximum iterations: 100
 relative tolerance: 1.0e-12
 absolute tolerance: 1.0e-08
-relaxation parameter: 1.0
 interface predictor: true

examples/nonoverlap/dynamic-same-step/cuboids-robin-robin/cuboids.yaml

@@ -9,4 +9,3 @@ minimum iterations: 1
 maximum iterations: 100
 relative tolerance: 1.0e-12
 absolute tolerance: 1.0e-08
-relaxation parameter: 1.0

examples/nonoverlap/static-same-step/cuboids-robin-robin/cuboids.yaml

@@ -9,4 +9,3 @@ minimum iterations: 1
 maximum iterations: 64
 relative tolerance: 1.0e-13
 absolute tolerance: 1.0e-09
-relaxation parameter: 1.0

src/ics_bcs.jl

@@ -710,9 +710,7 @@ function apply_bc(model::Model, bc::SolidMechanicsSchwarzBoundaryCondition)
     set_internal_force!(coupled_model, interp_∂Ω_f)
 
     # Apply relaxed update if needed
-    if bc isa SolidMechanicsContactSchwarzBoundaryCondition ||
-        bc isa SolidMechanicsNonOverlapSchwarzBoundaryCondition ||
-        bc isa SolidMechanicsRobinSchwarzBoundaryCondition
+    if bc isa SolidMechanicsContactSchwarzBoundaryCondition || bc isa SolidMechanicsNonOverlapSchwarzBoundaryCondition
         θ = controller.relaxation_parameter
         iter = controller.iteration_number