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Commit 84975a57 authored by Elias Pipping's avatar Elias Pipping Committed by Elias Pipping
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Solve a problem that is not soft

parent ed72c55c
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......@@ -17,12 +17,8 @@ enable_timer = false
refinements = 4
[body]
E = 2e7
# "Most steels and rigid polymers when used within their design limits
# (before yield) exhibit values of about 0.3"
# -- http://en.wikipedia.org/wiki/Poisson's_ratio
nu = 0.3 # Needs to be strictly below 0.5; the closer we get, the
# tougher the problem. But we do have convergence!
E = 5e7
nu = 0.3 # The close we get to 0.5, the more wiggly everything gets
[solver]
tolerance = 1e-11
......@@ -51,31 +47,28 @@ acceptFactor = 1.0
requiredResidual = 1e-12
[boundary.friction]
normalstress = 10000000
# "Most dry materials in combination have friction coefficient values
# between 0.3 and 0.6"
# -- http://en.wikipedia.org/wiki/Friction#Coefficient_of_friction
normalstress = 50000
# "mu_0 is the nominal coefficient of friction that has values near 0.6"
# -- James H. Dieterich and Brian Kilgore: Implications of fault
# constitutive properties for earthquake prediction
# http://earthquake.usgs.gov/research/physics/lab/prediction.pdf
mu = 0.5
mu = 0.6
eta = 1
model = Exponential
[boundary.friction.state]
# log(alpha(0))
initial = -2.23805
initial = 0
model = Dieterich # Ruina
[boundary.friction.ruina]
# "For rocks, typical values of A and B range from 0.005 to 0.015"
# -- Ronaldo I. Borja and Craig D. Foster:
# Continuum mathematical modeling of slip weakening in geological systems
a = 0.0075
a = 0.010
b = 0.015
# If L is too large, reaching a steady state takes too long
L = 1e-3
L = 1e-5
# The second-order a and b terms in [..] are very important in
# determining whether sliding is stable or unstable and (in appli-
......
......@@ -13,7 +13,7 @@ class neumannCondition:
class dirichletCondition:
def __call__(self, x):
return 2
return .005
# return 0
fst = 3e-1
snd = 5e-1
......
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