Elastic

cauchy_stress(model::AlmansiHamel, F) -> Matrix{Float64}

cauchy_tangent_stiffness(
    model::AlmansiHamel,
    F
) -> Array{Float64, 4}

first_piola_kirchhoff_stress(
    model::AlmansiHamel,
    F
) -> Matrix{Float64}

first_piola_kirchhoff_tangent_stiffness(
    model::AlmansiHamel,
    F
) -> Array{Float64, 4}

second_piola_kirchhoff_stress(
    model::AlmansiHamel,
    F
) -> Matrix{Float64}

second_piola_kirchhoff_tangent_stiffness(
    model::AlmansiHamel,
    F
) -> Array{Float64, 4}