Zobrazeno 1 - 10
of 87
pro vyhledávání: '"ROSAKIS, Phoebus"'
We derive sharp-interface models for one-dimensional brittle fracture via the inverse-deformation approach. Methods of Gamma-convergence are employed to obtain the singular limits of previously proposed models. The latter feature a local, non-convex
Externí odkaz:
http://arxiv.org/abs/2403.00838
Autor:
Kalaitzidou, Chrysovalantou, Grekas, Georgios, Zilian, Andreas, Makridakis, Charalambos, Rosakis, Phoebus
Through modelling and simulations we show that material instabilities play a dominant role in the mechanical behavior of the fibrous collagen Extracellular Matrix (ECM), as observed when the ECM is deformed by contractile biological cells. We compare
Externí odkaz:
http://arxiv.org/abs/2212.01213
We propose a mesh-free method to solve nonconvex energy minimization problems for martensitic phase transitions and twinning in crystals, using the deep learning approach. These problems pose multiple challenges to both analysis and computation, as t
Externí odkaz:
http://arxiv.org/abs/2206.13937
Publikováno v:
Surface Science, Young Investigator Special Issue(2023)
We present data-driven simulations for gold nanostructures, and develop a model that links total energy to geometrical features of the particle, with the ultimate goal of deriving reliable edge energies of gold. Assuming that the total energy can be
Externí odkaz:
http://arxiv.org/abs/2206.12239
We propose a one-dimensional, nonconvex elastic constitutive model with higher gradients that can predict spontaneous fracture at a critical load via a bifurcation analysis. It overcomes the problem of discontinuous deformations without additional fi
Externí odkaz:
http://arxiv.org/abs/2006.16770
Autor:
Rosakis, Phoebus, Marketou, Maria
Publikováno v:
The Journal of infection, S0163-4453(20)30391-1. 11 Jun. 2020
The case fatality ratio (CFR) for COVID-19 is difficult to estimate. One difficulty is due to ignoring or overestimating time delay between reporting and death. We claim that all of these cause large errors and artificial time dependence of the CFR.
Externí odkaz:
http://arxiv.org/abs/2006.05860
Publikováno v:
In Computer Methods in Applied Mechanics and Engineering 1 November 2023 416
We consider a model of energy minimization arising in the study of the mechanical behavior caused by cell contraction within a fibrous biological medium. The macroscopic model is based on the theory of non rank-one convex nonlinear elasticity for pha
Externí odkaz:
http://arxiv.org/abs/1907.01382
Autor:
Grekas, Georgios, Proestaki, Maria, Rosakis, Phoebus, Notbohm, Jacob, Makridakis, Charalambos, Ravichandran, Guruswami
Publikováno v:
Journal of the Royal Society Interface 18: 20200823 2021
Through mechanical forces, biological cells remodel the surrounding collagen network, generating striking deformation patterns. Tethers-tracts of high densification and fiber alignment-form between cells, thinner bands emanate from cell clusters. Whi
Externí odkaz:
http://arxiv.org/abs/1905.11246
Publikováno v:
In Surface Science February 2023