Nonlinear responses of metals and composites

Dataset composed of two main parts
    1. Material characterization of a metal (from lab test)

        Single file: `metal-tensile.txt`
        Material characteristics:
            - isotropic elastoplastic material with isotropic hardening
            - poisson ratio = 0.3
        Geometrical characteristics:
            - specimen geometry: bar
            - initial length = 1000 mm
            - initial cross section = 35.28 mm^2
        Loading characteristics:
            - uniaxial tension

    2. Composite open-hole substructure characterization (from FE simulations)

        Multiple files: `EaX_EbY_EsZ.txt` (see README.txt for nomenclature)
        Layup:
            - [45/90/-45/0]s
        Damage criterion:
            - Hashin with cohesive damage propagation
            - No delaminations considered
        Loading characteristics:
            - Homogenized strain loading over the plate edges
            - In plane loading: different combinations of (eps_1, eps_2, eps_12)
            - In plane response: (sig_1, sig_2, sig_12), i.e. homogenized stresses