Isotropic Softening Material

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Constitutive Law

This MPM Material is an isotropic, elastic material, but once it fails, it develops anisotropic damage. The constitutive law for this material is \tens\sigma = (\tens I - \tens D)\tens C \tens \varepsilon

The elastic regime for this material is identical to a Mooney except that it only allows a Neohookean elastic regime (with G = G1 and G2 = 0).,

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