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Constrained ALE-Based Discrete Fracture in Shells with Quasi-Brittle and Ductil...
Areias, Pedro; Van Goethem, Nicolas; Borges Pires, EduardoShell fracture using Arbitrary Lagrangian-Eulerian method.
Exact corotational shell for finite strains and fracture
Areias, Pedro; Garção, Eugénio; Borges Pires, Eduardo; Infante Barbosa, JoaquimThe corotational method for frame-invariant elements is generalized to obtain a consistent large-strain shell element incorporating thickness extensibility. The resulting element allows arbitrary in-plane deformations and is distinct from the traditional corotational methods (either quadrature-based or element-based) in the sense that the corotational frame is exact. The polar decomposition operation is perform...
A damage model for ductile crack initiation and propagation
Areias, Pedro; Van Goethem, Nicolas; Borges Pires, EduardoDamage-induced ductile crack initiation and propagation is modeled using a constitutive law with asymmetrical contraction of the yield surface and tip remeshing combined with a nonlocal strain technique. In practice, this means that the void fraction depends on a nonlocal strain. Finite strain plasticity is used with smoothing of the complementarity condition. The prototype constitutive laws take into account p...
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