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https://github.com/JuliaFEM/JuliaFEM.jl.git
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femtocleaner[bot]
74 lines
2.7 KiB
Julia
74 lines
2.7 KiB
Julia
# This file is a part of JuliaFEM.
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# License is MIT: see https://github.com/JuliaFEM/JuliaFEM.jl/blob/master/LICENSE.md
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"""
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Parameters
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----------
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distval
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a charasteristic measure to skip element pair, 0..5 => near, 10+ => far
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5 means that distance of slave element midpoint and point to project
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is 5 times larger than length of element
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"""
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mutable struct Contact <: BoundaryProblem
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dimension :: Int
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rotate_normals :: Bool
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finite_sliding :: Bool
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friction :: Bool
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dual_basis :: Bool
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use_forwarddiff :: Bool
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forwarddiff_assemble_in_pieces :: Bool
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minimum_active_set_size :: Int
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distval :: Float64
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remove_from_set :: Bool # allow removal of non-potential contact pairs
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allow_quads :: Bool
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remove_nodes :: Vector{Int}
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always_in_contact :: Bool
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update_contact_pairing :: Bool
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iteration :: Int
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contact_state_in_first_iteration :: Symbol
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alpha :: Float64
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drop_tolerance :: Float64
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store_fields :: Vector{AbstractString}
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end
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function Contact()
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default_fields = ["element area", "contact area", "weighted gap",
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"contact pressure", "active nodes", "inactive nodes", "stick nodes",
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"slip nodes", "complementarity condition", "contact error"]
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return Contact(
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-1, # dimension
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false, # rotate_normals
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false, # finite_sliding
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false, # friciton
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true, # dual basis
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false, # use forwarddiff
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false, # when using forwarddiff, assemble interface in pieces
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0, # minimum active set size
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5.0, # distance value for contact detection
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false, # allow removal of non-potential contact pairs
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false, # allow quadrangles in contact discretization
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[], # remove these nodes always from set
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false, # mainly for debugging, do not remove inactive nodes
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true, # update contact pairing on each loop
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1, # iteration counter
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:AUTO, # contact state in first iteration, AUTO, INACTIVE, ACTIVE
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0.0, # alpha basis transform parameter
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1.0e-9, # drop tolerance
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default_fields)
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end
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function assemble!(problem::Problem{Contact}, time::Real)
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if problem.properties.dimension == -1
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problem.properties.dimension = dim = size(first(problem.elements), 1)
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end
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dimension = Val{problem.properties.dimension}
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finite_sliding = Val{problem.properties.finite_sliding}
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friction = Val{problem.properties.friction}
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use_forwarddiff = Val{problem.properties.use_forwarddiff}
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assemble!(problem, time, dimension, finite_sliding, friction, use_forwarddiff)
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problem.properties.iteration += 1
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end
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const ContactElements2D = Union{Seg2}
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