cosserat-continuum-wong-pellegrino-wrinkling.parset

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

structuredGrid = true
lower = 0 0
upper = 0.38 0.128
elements = 15 5

# 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-8

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

# Initial trust-region radius
initialTrustRegionRadius = 0.001

# 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
############################


# Parameters for the shearing/wrinkling example from Wong/Pellegrino 2006
# We use 'meters' as the length unit
[materialParameters]

# shell thickness
thickness = 2.5e-5

# Lame parameters
# corresponds to E = 3.5GPa, nu=0.31
mu = 5.6452e+09
lambda = 2.1796e+09

# Cosserat couple modulus
mu_c = 0

# Length scale parameter
L_c = 2.5e-8

# Curvature exponent
q = 2

# Shear correction factor
kappa = 1

[]

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

problem = wong-pellegrino

###  Python predicate specifying all Dirichlet grid vertices
# x is the vertex coordinate
dirichletVerticesPredicate = "x[1] < 0.0001 or x[1] > 0.128 - 0.0001"

# Initial deformation
#startFromFile = true
initialIterateFilename = cosserat_iterate_2.vtu
initialDeformation = "[x[0] + 0.003*x[1] / 0.128, x[1], 0.002*math.cos(1e4*x[0])]"