177 citations · 431 across the 12 of their papers we have counts for
12 papers
Evolution TANN and the identification of internal variables and evolution equations in solid mechanics
Filippo Masi, Ioannis Stefanou
Data-driven and deep learning approaches have demonstrated to have the potential of replacing classical constitutive models for complex materials. Yet, the necessity of structuring…
Passivity-based control of underactuated mechanical systems with Coulomb friction: Application to earthquake prevention
Diego Gutierrez-Oribio, Ioannis Stefanou, Franck Plestan
Passivity property gives a sense of energy balance. The classical definitions and theorems of passivity in dynamical systems require time invariance and locally Lipschitz functions…
Fault friction under thermal pressurization during large coseismic-slip Part II: Expansion to the model of frictional slip
Alexandros Stathas, Ioannis Stefanou
In Stathas and Stefanou (2022) we presented the frictional response of a bounded fault gouge under largecoseismic slip. We did so by taking into account the evolution of the Princi…
Fault friction under thermal pressurization during large coseismic-slip Part I: Numerical analyses
Alexandros Stathas, Ioannis Stefanou
In this paper, we study the role of thermal pressurization in the frictional response of a fault under large coseismic slip. We investigate the role of the seismic slip velocity, m…
Motion Planning and Robust Tracking for the Heat Equation using Boundary Control
Diego Gutiérrez-Oribio, Yury Orlov, Ioannis Stefanou +1
Robust output tracking is addressed in this paper for a heat equation with Neumann boundary conditions and anti-collocated boundary input and output. The desired reference tracking…
Earthquake Control: An Emerging Application for Robust Control. Theory and Experimental Tests
Diego Gutiérrez-Oribio, Georgios Tzortzopoulos, Ioannis Stefanou +1
This paper addresses the possibility of using robust control theory for preventing earthquakes through fluid injections in the earth's crust. The designed robust controllers drive…
Multiscale modeling of inelastic materials with Thermodynamics-based Artificial Neural Networks (TANN)
Filippo Masi, Ioannis Stefanou
The mechanical behavior of inelastic materials with microstructure is very complex and hard to grasp with heuristic, empirical constitutive models. For this purpose, multiscale, ho…
Controlling earthquake-like instabilities using artificial intelligence
Efthymios Papachristos, Ioannis Stefanou
Earthquakes are lethal and costly. This study aims at avoiding these catastrophic events by the application of injection policies retrieved through reinforcement learning. With the…
The role of viscous regularization in dynamical problems, strain localization and mesh dependency
Alexandros Stathas, Ioannis Stefanou
Strain localization is responsible for mesh dependence in numerical analyses concerning a vast variety of fields such as solid mechanics, dynamics, biomechanics and geomechanics. T…
Scaling laws for the rigid-body response of masonry structures under blast loads
Filippo Masi, Ioannis Stefanou, Victor Maffi-Berthier
The response of masonry structures to explosions can be hardly investigated relying only on numerical and analytical tools. Experimental tests are of paramount importance for impro…
Control instabilities and incite slow-slip in generalized Burridge-Knopoff models
Ioannis Stefanou
Generalized Burridge-Knopoff (GBK) models display rich dynamics, characterized by instabilities and multiple bifurcations. GBK models consist of interconnected masses that can slid…
Seismic reliability assessment of classical columns subjected to near-fault ground motions
Ioannis Psycharis, Michalis Fragiadakis, Ioannis Stefanou
A methodology for the performance-based seismic risk assessment of classical columns is presented. Despite their apparent instability, classical columns are, in general, earthquake…