mirror of
https://github.com/JuliaFEM/JuliaFEM.jl.git
synced 2026-09-12 06:22:00 +00:00
Jukka Aho
45 lines
1.4 KiB
Julia
45 lines
1.4 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.Test
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@testset "test eigenvalues for single tet4 element" begin
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X = Dict{Int, Vector{Float64}}(
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1 => [2.0, 3.0, 4.0],
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2 => [6.0, 3.0, 2.0],
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3 => [2.0, 5.0, 1.0],
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4 => [4.0, 3.0, 6.0])
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u = Dict{Int, Vector{Float64}}(
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1 => [0.0, 0.0, 0.0],
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2 => [0.0, 0.0, 0.0],
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3 => [0.0, 0.0, 0.0],
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4 => [0.25, 0.25, 0.25])
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e1 = Element(Tet4, [1, 2, 3, 4])
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e2 = Element(Tri3, [1, 2, 3])
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update!([e1, e2], "geometry", X)
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update!([e1, e2], "displacement", u)
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update!(e1, "youngs modulus" => 96.0,
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"poissons ratio" => 1.0/3.0,
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"density" => 420.0)
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update!(e2, "displacement 1" => 0.0,
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"displacement 2" => 0.0,
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"displacement 3" => 0.0)
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p1 = Problem(Elasticity, 3)
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p1.properties.finite_strain = false
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p2 = Problem(Dirichlet, p1)
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push!(p1, e1)
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push!(p2, e2)
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s1 = Solver(Modal)
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s1.properties.which = :LM
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push!(s1, p1, p2)
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call(s1; debug=true)
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@test isapprox(s1.properties.eigvals, [4/3, 1/3])
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p1.properties.geometric_stiffness = true
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s1.properties.geometric_stiffness = true
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call(s1; debug=true)
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@test isapprox(s1.properties.eigvals, [5/3, 2/3])
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end
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