Mutable αr in magnetic models

[miguelmaso]

changes from #158

Features

• Overloaded getproperty to ease getting/setting αr field.
• αr behaves as a mutable field, the energy functions point to the reference.
• Minor cleanup of magnetic models: used property destructing and moved energy functions outside the struct.

Revision of files changed

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[github-actions]

Benchmark Results (Julia v1)

Time benchmarks

	main	16d13a4...	main / 16d13a4...
Constitutive models/Visco-elastic Ψ	0.0474 ± 0.03 ms	0.0486 ± 0.03 ms	0.975 ± 0.86
Constitutive models/Visco-elastic ∂Ψu	0.0537 ± 0.0019 ms	0.0557 ± 0.0028 ms	0.965 ± 0.059
Constitutive models/Visco-elastic ∂Ψuu	0.101 ± 0.016 ms	0.103 ± 0.017 ms	0.982 ± 0.23
Simulations/StaticMechanicalDirichlet	0.136 ± 0.0069 s	0.133 ± 0.0067 s	1.02 ± 0.073
Simulations/StaticMechanicalNeumann	0.128 ± 0.012 s	0.13 ± 0.012 s	0.99 ± 0.13
Simulations/ViscoElastic	18.4 s	18.5 s	0.994
Tensor algebra/Cofactor	0.06 ± 0.01 μs	0.06 ± 0.01 μs	1 ± 0.24
Tensor algebra/Det(A)Inv(A')	0.12 ± 0.011 μs	0.121 ± 0.04 μs	0.992 ± 0.34
Tensor algebra/δδ_λ_2d	30 ± 0 ns	30 ± 0 ns	1 ± 0
Tensor algebra/δδ_μ_2d	30 ± 0 ns	30 ± 0 ns	1 ± 0
time_to_load	2.84 ± 0.093 s	2.75 ± 0.0054 s	1.04 ± 0.034

Memory benchmarks

	main	16d13a4...	main / 16d13a4...
Constitutive models/Visco-elastic Ψ	1.24 k allocs: 0.0777 MB	1.24 k allocs: 0.0777 MB	1
Constitutive models/Visco-elastic ∂Ψu	1.29 k allocs: 0.0826 MB	1.29 k allocs: 0.0826 MB	1
Constitutive models/Visco-elastic ∂Ψuu	2.25 k allocs: 0.149 MB	2.25 k allocs: 0.149 MB	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	0.327 G allocs: 20.6 GB	0.327 G allocs: 20.6 GB	1
Tensor algebra/Cofactor	1 allocs: 0.0781 kB	1 allocs: 0.0781 kB	1
Tensor algebra/Det(A)Inv(A')	4 allocs: 0.25 kB	4 allocs: 0.25 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	0.159 k allocs: 11.6 kB	0.964