Zobrazeno 1 - 10
of 31
pro vyhledávání: '"Salman, O. U."'
Navigating with Stability: Local Minima, Patterns, and Evolution in a Gradient Damage Fracture Model
In phase-field theories of brittle fracture, crack initiation, growth and path selection are investigated using non-convex energy functionals and a stability criterion. The lack of convexity with respect to the state poses difficulties to monolithic
Externí odkaz:
http://arxiv.org/abs/2409.04307
Dislocation nucleation in homogeneous crystals initially unfolds as a linear symmetry-breaking elastic instability. In the absence of explicit nucleation centers, such instability develops simultaneously all over the crystal and due to the dominance
Externí odkaz:
http://arxiv.org/abs/2211.14942
Plastic deformations in crystals often produce textures in the form of randomly oriented patches of the unstressed lattice. We use a novel mesoscopic Landau-type model of crystal plasticity to show that in such textures large crystallographic lattice
Externí odkaz:
http://arxiv.org/abs/2203.08711
We study the mechanical response of a dislocation-free 2D crystal under homogenous shear using a new mesoscopic approach to crystal plasticity, a Landau-type theory, accounting for the global invariance of the energy in the space of strain tensors wh
Externí odkaz:
http://arxiv.org/abs/2103.00319
Autor:
Salman, O. U., Truskinovsky, L.
Extreme localization of damage in conventional brittle materials is the source of a host of undesirable effects. We show how artificially engineered metamaterials with all brittle constituents can be designed to ensure that every breakable sub-elemen
Externí odkaz:
http://arxiv.org/abs/2011.00505
Titanium and its alloys undergo temperature-driven martensitic phase transformation leading to the development of complex microstructures at mesoscale. Optimizing the mechanical properties of these materials requires an understanding of the correlati
Externí odkaz:
http://arxiv.org/abs/2008.02128
Publikováno v:
Phys. Rev. E 102, 023006 (2020)
We address the question of why larger, high symmetry crystals are mostly weak, ductile and statistically sub-critical, while smaller crystals with the same symmetry are strong, brittle and super-critical. We link it to another question of why intermi
Externí odkaz:
http://arxiv.org/abs/2004.08579
Akademický článek
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Publikováno v:
Phys. Rev. E 100, 051001 (2019)
Transition from bending-dominated to stretching-dominated elastic response in semi-flexible fibrous networks plays an important role in the mechanical behavior of cells and tissues. It is induced by changes in network connectivity and relies on const
Externí odkaz:
http://arxiv.org/abs/1906.01750
Publikováno v:
Phys. Rev. Lett. 123, 205501 (2019)
We show that nonlinear continuum elasticity can be effective in modeling plastic flows in crystals if it is viewed as Landau theory with an infinite number of equivalent energy wells whose configuration is dictated by the symmetry group GL(3,Z). Quas
Externí odkaz:
http://arxiv.org/abs/1904.03429