A Variational Constitutive Model for Void Growth in Crystals Application to Nanocrystals



A Modulus gradient elasticity model for nano-reinforced composites
Gülaşık, Hasan; Gürses, Ercan; Department of Aerospace Engineering (2018)
In this work, nanocomposites and their numerical simulations are studied. At the beginning of the study, the properties of the polymer nanocomposites are explained based on a specific nano-inclusion and polymer matrix couple, namely, carbon nanotube (CNT) and thermoplastic polyetheretherketone (PEEK) polymer. In a literature comparison study, it is shown that the properties of the constituents, interface properties, manufacturing methods, characterization methods and therefore mechanical properties of the C...
A Variational Constitutive Model of Void Growth in Single and Polycrystals Application to Ultrafine Grained and Nanocrystalline Materials
Gürses, Ercan (null; 2010-07-23)
A continuum model for dephasing in mesoscopic systems
Şenozan, Selma; Turgut, Sadi; Tomak, Mehmet (Elsevier BV, 2011-08-01)
A model of continuous dephasing for one-dimensional mesoscopic conductors is proposed. The model is based on Buttiker's fictitious-probe model which is extended by attaching an infinite number of probes uniformly to various points on the conductor. The associated scattering problem is then solved. When the continuum limit is taken, it becomes possible to describe the dephasing as taking place everywhere. The dephasing rate enters into the model as an adjustable parameter. The effect of dephasing on the cond...
A variational multiscale constitutive model for nanocrystalline materials
Gürses, Ercan (Elsevier BV, 2011-03-01)
This paper presents a variational multi-scale constitutive model in the finite deformation regime capable of capturing the mechanical behavior of nanocrystalline (nc) fcc metals. The nc-material is modeled as a two-phase material consisting of a grain interior phase and a grain boundary effected zone (GBAZ). A rate-independent isotropic porous plasticity model is employed to describe the GBAZ, whereas a crystal-plasticity model which accounts for the transition from partial dislocation to full dislocation m...
A continuum model for decoherence in 1D transport
Şenozan, Selma; Turgut, Sadi; Department of Physics (2005)
In this thesis we study the conductance of a one dimensional conductor in the presence of dephasing. Dephasing effects are modelled after generalizing Büttiker̕s dephasing model (Phys. Rev. B 33, 3020 (1986)) to a continuous one. Infinitely many electron reservoirs are coupled to the conductor as phase breakers and the method for calculating the conductance is presented. We investigate how this continuum decoherence effect the conductance of a wire, with single and double rectangular barriers.
Citation Formats
E. Gürses, “A Variational Constitutive Model for Void Growth in Crystals Application to Nanocrystals,” 2010, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/80552.