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- W3133399158 abstract "In this work, we present a nonlocal phase field model for damage in brittle materials. We define a non-conservative order parameter for representing the damage. The Helmholtz free energy functional of the Ginzburg-Landau type that incorporates a new degradation function for the elastic strain energy is considered. The hypothesis of strain equivalence and strain energy equivalence from continuum damage mechanics are adopted to predict the evolution of damage. A conjugate force to damage is derived for both these hypothesis to arrive at a damage criterion. The strong interrelation between phase field models and gradient damage models has been brought out. The solution of the nonlinear system of coupled equation is achieved by a change in the modified Arc-length method and considering a staggered approach. In this approach a linearization of the Crisfield Arc-length quadratic equation for calculation of load increment factor results in an unique root. Numerical examples are presented to demonstrate the usefulness of the proposed damage model." @default.
- W3133399158 created "2021-03-01" @default.
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- W3133399158 date "2021-06-01" @default.
- W3133399158 modified "2023-10-14" @default.
- W3133399158 title "Nonlocal phase field approach for modeling damage in brittle materials" @default.
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- W3133399158 doi "https://doi.org/10.1016/j.mechmat.2021.103797" @default.
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