Added update_displacements! function

[miguelmaso]

• New update_displacements!
• Exported existing update_velocity!

[github-actions]

Benchmark Results (Julia v1)

Time benchmarks

	main	afc09f9...	main / afc09f9...
Constitutive models/Visco-elastic Ψ	0.0321 ± 0.013 ms	0.0318 ± 0.013 ms	1.01 ± 0.57
Constitutive models/Visco-elastic ∂Ψ∂F	27.4 ± 10 μs	27.6 ± 10 μs	0.992 ± 0.53
Constitutive models/Visco-elastic ∂∂Ψ∂FF	0.0625 ± 0.022 ms	0.0728 ± 0.023 ms	0.859 ± 0.4
Constitutive models/Visco-polyconvex Ψ	0.138 ± 0.002 μs	0.138 ± 0.002 μs	1 ± 0.02
Constitutive models/Visco-polyconvex ∂Ψ∂F	0.154 ± 0.003 μs	0.155 ± 0.002 μs	0.994 ± 0.023
Constitutive models/Visco-polyconvex ∂∂Ψ∂FF	7.18 ± 1.6 μs	7.33 ± 3.3 μs	0.979 ± 0.49
Simulations/StaticMechanicalDirichlet	0.129 ± 0.0067 s	0.129 ± 0.0076 s	1 ± 0.079
Simulations/StaticMechanicalNeumann	0.107 ± 0.018 s	0.108 ± 0.019 s	0.996 ± 0.24
Simulations/ViscoElastic	11 s	11.2 s	0.984
Tensor algebra/Cofactor	0.063 ± 0.003 μs	0.064 ± 0.002 μs	0.984 ± 0.056
Tensor algebra/Det(A)Inv(A')	0.088 ± 0.003 μs	0.088 ± 0.003 μs	1 ± 0.048
Tensor algebra/IIsym	0.06 ± 0.003 μs	0.057 ± 0.003 μs	1.05 ± 0.076
Tensor algebra/push_forward_C_to_F	0.181 ± 0.006 μs	0.185 ± 0.003 μs	0.978 ± 0.036
Tensor algebra/×ᵢ⁴	0.055 ± 0.002 μs	0.054 ± 0.002 μs	1.02 ± 0.053
Tensor algebra/δδ_λ_2d	22 ± 1 ns	22 ± 1 ns	1 ± 0.064
Tensor algebra/δδ_μ_2d	22 ± 1 ns	22 ± 1 ns	1 ± 0.064
time_to_load	2.31 ± 0.015 s	2.31 ± 0.0089 s	1 ± 0.0076

Memory benchmarks

	main	afc09f9...	main / afc09f9...
Constitutive models/Visco-elastic Ψ	0.542 k allocs: 0.0443 MB	0.542 k allocs: 0.0443 MB	1
Constitutive models/Visco-elastic ∂Ψ∂F	0.593 k allocs: 0.0492 MB	0.593 k allocs: 0.0492 MB	1
Constitutive models/Visco-elastic ∂∂Ψ∂FF	1.05 k allocs: 0.0853 MB	1.05 k allocs: 0.0853 MB	1
Constitutive models/Visco-polyconvex Ψ	0 allocs: 0 B	0 allocs: 0 B
Constitutive models/Visco-polyconvex ∂Ψ∂F	0 allocs: 0 B	0 allocs: 0 B
Constitutive models/Visco-polyconvex ∂∂Ψ∂FF	0.187 k allocs: 15.2 kB	0.187 k allocs: 15.2 kB	1
Simulations/StaticMechanicalDirichlet	1.51 M allocs: 0.108 GB	1.51 M allocs: 0.108 GB	1
Simulations/StaticMechanicalNeumann	1.48 M allocs: 0.0927 GB	1.48 M allocs: 0.0927 GB	1
Simulations/ViscoElastic	0.162 G allocs: 12.8 GB	0.162 G allocs: 12.8 GB	1
Tensor algebra/Cofactor	2 allocs: 0.156 kB	2 allocs: 0.156 kB	1
Tensor algebra/Det(A)Inv(A')	4 allocs: 0.25 kB	4 allocs: 0.25 kB	1
Tensor algebra/IIsym	1 allocs: 0.656 kB	1 allocs: 0.656 kB	1
Tensor algebra/push_forward_C_to_F	1 allocs: 0.656 kB	1 allocs: 0.656 kB	1
Tensor algebra/×ᵢ⁴	1 allocs: 0.656 kB	1 allocs: 0.656 kB	1
Tensor algebra/δδ_λ_2d	0 allocs: 0 B	0 allocs: 0 B
Tensor algebra/δδ_μ_2d	0 allocs: 0 B	0 allocs: 0 B
time_to_load	0.149 k allocs: 11.1 kB	0.149 k allocs: 11.1 kB	1