From cabca53f2df3eb29b96baf1c70f08a461b5f5284 Mon Sep 17 00:00:00 2001 From: Lisa Julia Nebel Date: Mon, 29 Jun 2020 16:25:09 +0200 Subject: [PATCH] Add parset file for the initial deformation for 'film-on-substrate' --- problems/film-on-substrate-deformation.parset | 133 ++++++++++++++++++ 1 file changed, 133 insertions(+) create mode 100644 problems/film-on-substrate-deformation.parset diff --git a/problems/film-on-substrate-deformation.parset b/problems/film-on-substrate-deformation.parset new file mode 100644 index 0000000..0a1c371 --- /dev/null +++ b/problems/film-on-substrate-deformation.parset @@ -0,0 +1,133 @@ +############################################# +# Grid parameters +############################################# + +structuredGrid = true +lower = 0 0 0 + +# whole experiment: 45 mm x 10 mm x 2 mm, scaling with 10^7 such that the thickness, which is around 100 nm, so 100x10^-9 = 10^-7 is equal to 1. +# upper = 45e4 10e4 2e4 +# using only a section of the whole experiment as deformed grid to start with for dune-gfe: use much smaller dimensions! +upper = 600 200 200 + +elements = 15 5 5 + +# Number of grid levels +numLevels = 3 + +adaptiveRefinement = true + +############################################# +# 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 = 1000 + +# Number of presmoothing steps +nu1 = 3 + +# Number of postsmoothing steps +nu2 = 3 + +# Damping for the smoothers of the multigrid solver +damping = 1.0 + +# 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 + +############################ +# Material parameters +############################ + +energy = mooneyrivlin # stvenantkirchhoff, neohooke, hencky, exphencky or mooneyrivlin + +[materialParameters] + +## Lame parameters for stvenantkirchhoff, E = mu(3*lambda + 2*mu)/(lambda + mu) +#mu = 2.7191e+4 +#lambda = 4.4364e+4 + +#mooneyrivlin_a = 2.7191e+6 +#mooneyrivlin_b = 2.7191e+6 +#mooneyrivlin_c = 2.7191e+6 + +#mooneyrivlin_10 = -7.28e+5 #182 20:1 +#mooneyrivlin_01 = 9.17e+5 +#mooneyrivlin_20 = 1.23e+5 +#mooneyrivlin_02 = 8.15e+5 +#mooneyrivlin_11 = -5.14e+5 + +#mooneyrivlin_10 = -3.01e+6 #182 2:1 +#mooneyrivlin_01 = 3.36e+6 +#mooneyrivlin_20 = 5.03e+6 +#mooneyrivlin_02 = 13.1e+6 +#mooneyrivlin_11 = -15.2e+6 + +mooneyrivlin_10 = -1.67e+6 #184 2:1 +mooneyrivlin_01 = 1.94e+6 +mooneyrivlin_20 = 2.42e+6 +mooneyrivlin_02 = 6.52e+6 +mooneyrivlin_11 = -7.34e+6 + +mooneyrivlin_30 = 0 +mooneyrivlin_21 = 0 +mooneyrivlin_12 = 0 +mooneyrivlin_03 = 0 + +# volume-preserving parameter +mooneyrivlin_k = 75e+6 + +# How to choose the volume-preserving parameter? +# We need a stretch of 30% (45e4 10e4 2e4 in x-direction, so a stretch of 45e4*0.3 = 13.5e4) +# 184 2:1, mooneyrivlin_k = .. and mooneyrivlin_energy = square, neumannValues = 27e4 0 0 +# 184 2:1, mooneyrivlin_k = 57e+6 and mooneyrivlin_energy = log, neumannValues = 27e4 0 0 + +mooneyrivlin_energy = square # log, square or ciarlet; different ways to compute the Mooney-Rivlin-Energy + +# ciarlet: Fomula from "Ciarlet: Three-Dimensional Elasticity", here no penalty term is +# log: Generalized Rivlin model or polynomial hyperelastic model, using 0.5*mooneyrivlin_k*log(det(∇φ)) as the volume-preserving penalty term +# square: Generalized Rivlin model or polynomial hyperelastic model, using mooneyrivlin_k*(det(∇φ)-1)² as the volume-preserving penalty term + +[] + +############################################# +# Boundary values +############################################# + +problem = wriggers-l-shape + +### Python predicate specifying all Dirichlet grid vertices +# x is the vertex coordinate +dirichletVerticesPredicate = "x[0] < 0.01" + +### Python predicate specifying all neumannValues grid vertices +# x is the vertex coordinate +neumannVerticesPredicate = "x[0] > 599.99" + +### Neumann values +neumannValues = 27e4 0 0 + +# Initial deformation +initialDeformation = "[x[0], x[1], x[2]]" -- GitLab