cosserat-continuum-wriggers-l-shape.parset

#############################################
#  Grid parameters
#############################################

structuredGrid = false
path = /home/sander/data/shells/wriggers_L_shape/
gridFile = wriggers-L-shape_99.msh

# Number of grid levels
numLevels = 1

#############################################
#  Solver parameters
#############################################

# Number of homotopy steps for the Dirichlet boundary conditions
numHomotopySteps = 1

# Tolerance of the trust region solver
tolerance = 1e-6

# Max number of steps of the trust region solver
maxTrustRegionSteps = 500

# Initial trust-region radius
initialTrustRegionRadius = 0.1

# Number of multigrid iterations per trust-region step
numIt = 200

# Number of presmoothing steps
nu1 = 3

# Number of postsmoothing steps
nu2 = 3

# Number of coarse grid corrections
mu = 1

# Number of base solver iterations
baseIt = 100

# Tolerance of the multigrid solver
mgTolerance = 1e-7

# Tolerance of the base grid solver
baseTolerance = 1e-8

# Measure convergence
instrumented = 0

############################
#   Material parameters
############################


## For the Wriggers L-shape example
[materialParameters]

# shell thickness
thickness = 0.6e-3

# Lame parameters
# corresponds to E = 71240 N/mm^2, nu=0.31
# However, we use units N/m^2
mu = 2.7191e+10
lambda = 4.4364e+10

# Cosserat couple modulus
mu_c = 0

# Length scale parameter
L_c = 0.6e-3

# Curvature exponent
q = 2

# Shear correction factor
kappa = 0.01

[]

#############################################
#  Boundary values
#############################################

problem = wriggers-l-shape

###  Python predicate specifying all Dirichlet grid vertices
# x is the vertex coordinate
dirichletVerticesPredicate = "x[0] < 0.001"

###  Python predicate specifying all Dirichlet grid vertices
# x is the vertex coordinate
neumannVerticesPredicate = "x[1] < -0.239"

###  Neumann values, if needed
#neumannValues =  -2e7 0 0

# Initial deformation
#initialDeformation = "[x[0], x[1], -0.3*x[0]*(0.24+x[1])]"
initialDeformation = "[x[0], x[1], 0 if (x[0] < 0.225 or x[1] <-0.015) else 4*(x[0]-0.225)*(x[1]+0.015)]"