M
Michael Ortiz
Researcher at California Institute of Technology
Publications - 489
Citations - 34601
Michael Ortiz is an academic researcher from California Institute of Technology. The author has contributed to research in topics: Finite element method & Dislocation. The author has an hindex of 87, co-authored 467 publications receiving 31582 citations. Previous affiliations of Michael Ortiz include Complutense University of Madrid & University of Seville.
Papers
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Journal ArticleDOI
Computational modelling of impact damage in brittle materials
G. T. Camacho,Michael Ortiz +1 more
TL;DR: In this paper, a Lagrangian finite element method of fracture and fragmentation in brittle materials is developed, where a cohesive-law fracture model is used to propagate multiple cracks along arbitrary paths.
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Quasicontinuum analysis of defects in solids
TL;DR: In this article, a finite element methodology for the analysis of problems requiring the simultaneous resolution of continuum and atomistic length scales-and associated deformation processes-in a unified manner is presented.
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Finite-deformation irreversible cohesive elements for three-dimensional crack-propagation analysis
Michael Ortiz,Anna Pandolfi +1 more
TL;DR: In this paper, a three-dimensional finite deformation cohesive element and a class of irreversible cohesive laws are proposed to track dynamic growing cracks in a drop-weight dynamic fracture test.
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An analysis of a new class of integration algorithms for elastoplastic constitutive relations
Michael Ortiz,Juan C. Simo +1 more
TL;DR: In this article, an accuracy analysis of a new class of integration algorithms for finite deformation elastoplastic constitutive relations was carried out, where attention was confined to infinitesimal deformations.
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An adaptive finite element approach to atomic-scale mechanics—the quasicontinuum method
TL;DR: The quasicontinuum method as discussed by the authors links atomistic and continuum models through the device of the finite element method which permits a reduction of the full set of atomistic degrees of freedom.