mirror of
https://github.com/JuliaFEM/JuliaFEM.jl.git
synced 2026-08-06 04:21:33 +00:00
Tony Kelman
182 lines
7.0 KiB
Julia
182 lines
7.0 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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using JuliaFEM
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using JuliaFEM.Preprocess
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using JuliaFEM.Postprocess
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using JuliaFEM.Testing
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function get_test_model()
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X = Dict{Int64, Vector{Float64}}(
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1 => [0.0, 0.0],
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2 => [1.0, 0.0],
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3 => [1.0, 0.5],
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4 => [0.0, 0.5],
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5 => [0.0, 0.6],
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6 => [1.0, 0.6],
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7 => [1.0, 1.1],
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8 => [0.0, 1.1])
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el1 = Element(Quad4, [1, 2, 3, 4])
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el2 = Element(Quad4, [5, 6, 7, 8])
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el3 = Element(Seg2, [1, 2])
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el4 = Element(Seg2, [7, 8])
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el5 = Element(Seg2, [4, 3])
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el6 = Element(Seg2, [5, 6])
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update!([el1, el2, el3, el4, el5, el6], "geometry", X)
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update!([el1, el2], "youngs modulus", 96.0)
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update!([el1, el2], "poissons ratio", 1/3)
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update!([el3], "displacement 1", 0.0)
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update!([el3], "displacement 2", 0.0)
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update!([el4], "displacement 1", 0.0)
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update!([el4], "displacement 2", 0.0)
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update!(el6, "master elements", [el5])
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p1 = Problem(Elasticity, "body1", 2)
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p2 = Problem(Elasticity, "body2", 2)
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p3 = Problem(Dirichlet, "fixed", 2, "displacement")
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p4 = Problem(Mortar, "interface", 2, "displacement")
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push!(p1, el1)
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push!(p2, el2)
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push!(p3, el3, el4)
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push!(p4, el5, el6)
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return p1, p2, p3, p4
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end
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@testset "test adjust setting in 2d tie contact" begin
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p1, p2, p3, p4 = get_test_model()
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p1.properties.formulation = :plane_stress
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p2.properties.formulation = :plane_stress
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p4.properties.adjust = true
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p4.properties.rotate_normals = false
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solver = Solver(Linear)
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push!(solver, p1, p2, p3, p4)
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solver()
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el5 = p4.elements[1]
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u = el5("displacement", [0.0], 0.0)
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info("u = $u")
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@test isapprox(u, [0.0, 0.05])
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end
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@testset "test that interface transfers constant field without error" begin
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meshfile = @__DIR__() * "/testdata/block_2d.med"
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mesh = aster_read_mesh(meshfile)
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upper = Problem(Heat, "upper", 1)
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upper.properties.formulation = "2D"
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upper.elements = create_elements(mesh, "UPPER")
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update!(upper.elements, "temperature thermal conductivity", 1.0)
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lower = Problem(Heat, "lower", 1)
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lower.properties.formulation = "2D"
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lower.elements = create_elements(mesh, "LOWER")
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update!(lower.elements, "temperature thermal conductivity", 1.0)
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bc_upper = Problem(Dirichlet, "upper boundary", 1, "temperature")
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bc_upper.elements = create_elements(mesh, "UPPER_TOP")
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update!(bc_upper.elements, "temperature 1", 0.0)
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bc_lower = Problem(Dirichlet, "lower boundary", 1, "temperature")
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bc_lower.elements = create_elements(mesh, "LOWER_BOTTOM")
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update!(bc_lower.elements, "temperature 1", 1.0)
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interface = Problem(Mortar, "interface between upper and lower block", 1, "temperature")
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interface_slave_elements = create_elements(mesh, "LOWER_TOP")
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interface_master_elements = create_elements(mesh, "UPPER_BOTTOM")
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update!(interface_slave_elements, "master elements", interface_master_elements)
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interface.elements = [interface_master_elements; interface_slave_elements]
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solver = Solver(Linear)
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push!(solver, upper, lower, bc_upper, bc_lower, interface)
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solver()
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#interface_norm = norm(interface.assembly)
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# for bi-orthogonal:
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#interface_norm_expected = [0.0, 0.0, 0.0, 0.0, 0.0, 0.44870723441585775, 0.44870723441585775, 0.0, 0.0, 0.0]
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#interface_norm_expected = [0.0, 0.0, 0.0, 0.0, 0.0, 0.39361633468943247, 0.39361633468943247, 0.0, 0.0, 0.0]
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#info("Interface norm: $interface_norm")
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#info("Interface norm expected: $interface_norm_expected")
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#@test isapprox(interface_norm, interface_norm_expected)
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T_upper = first(bc_upper.elements)("temperature", [0.0], 0.0)
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T_lower = first(bc_lower.elements)("temperature", [0.0], 0.0)
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T_middle = first(interface.elements)("temperature", [0.0], 0.0)
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info("T upper: $T_upper, T lower: $T_lower, T interface: $T_middle")
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node_ids, temperature = get_nodal_vector(interface.elements, "temperature", 0.0)
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T = [t[1] for t in temperature]
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minT = minimum(T)
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maxT = maximum(T)
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info("minT = $minT, maxT = $maxT")
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@test isapprox(minT, 0.5)
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@test isapprox(maxT, 0.5)
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end
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#=
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# TODO: if one forget plane_stress solver gives singular exception and it's
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hard to trace to the source of problem
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@testset "expect clear error when trying to solve 2d model in 3d setting" begin
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p1, p2, p3, p4 = get_test_model()
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# p1.properties.formulation = :plane_stress
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# p2.properties.formulation = :plane_stress
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p4.properties.adjust = true
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p4.properties.rotate_normals = false
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solver = Solver(Nonlinear)
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solver.properties.linear_system_solver = :DirectLinearSolver_UMFPACK
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push!(solver, p1, p2, p3, p4)
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solver()
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el5 = p4.elements[1]
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u = el5("displacement", [0.0], 0.0)
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info("u = $u")
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@test isapprox(u, [0.0, 0.05])
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end
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=#
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@testset "test mesh tie with splitted block and plane stress elasticity" begin
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meshfile = @__DIR__() * "/testdata/block_2d.med"
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mesh = aster_read_mesh(meshfile)
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upper = Problem(Elasticity, "upper", 2)
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upper.properties.formulation = :plane_stress
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upper.elements = create_elements(mesh, "UPPER")
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update!(upper.elements, "youngs modulus", 100.0)
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update!(upper.elements, "poissons ratio", 1/3)
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lower = Problem(Elasticity, "lower", 2)
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lower.properties.formulation = :plane_stress
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lower.elements = create_elements(mesh, "LOWER")
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update!(lower.elements, "youngs modulus", 100.0)
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update!(lower.elements, "poissons ratio", 1/3)
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bc_upper = Problem(Dirichlet, "upper boundary", 2, "displacement")
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bc_upper.elements = create_elements(mesh, "UPPER_TOP")
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# update!(bc_upper.elements, "displacement 1", 0.1)
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update!(bc_upper.elements, "displacement 2", -0.1)
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bc_lower = Problem(Dirichlet, "lower boundary", 2, "displacement")
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bc_lower.elements = create_elements(mesh, "LOWER_BOTTOM")
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# update!(bc_lower.elements, "displacement 1", 0.0)
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update!(bc_lower.elements, "displacement 2", 0.0)
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bc_corner = Problem(Dirichlet, "fix model from lower left corner to prevent singularity", 2, "displacement")
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node_ids = find_nearest_nodes(mesh, [0.0, 0.0])
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bc_corner.elements = [Element(Poi1, node_ids)]
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update!(bc_corner.elements, "geometry", mesh.nodes)
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update!(bc_corner.elements, "displacement 1", 0.0)
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interface = Problem(Mortar, "interface between upper and lower block", 2, "displacement")
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interface_slave_elements = create_elements(mesh, "LOWER_TOP")
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interface_master_elements = create_elements(mesh, "UPPER_BOTTOM")
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update!(interface_slave_elements, "master elements", interface_master_elements)
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interface.elements = [interface_master_elements; interface_slave_elements]
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solver = Solver(Linear)
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push!(solver, upper, lower, bc_upper, bc_lower, interface, bc_corner)
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solver()
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slave_elements = get_slave_elements(interface)
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node_ids, la = get_nodal_vector(slave_elements, "lambda", 0.0)
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for lai in la
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@test isapprox(lai, [0.0, 10.0])
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end
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end
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