Publications
Highlights
(For a full list see below or visit Google Scholar)
We present the results of an experimental campaign on the bond behaviour between carbon fibre textile reinforced mortars and masonry substrate. The results highlight the beneficial effect of the epoxy resin coating that practically doubles the maximum attained loads. This increase is shown to be associated to a consistent shift of the failure mode from textile slippage to detachment at the matrix to matrix interface.
K. Makashev, S. P. Triantafyllou, G. E. Thermou, W. Tizani
Construction and Building Materials (2023)
We introduce a novel heterogeneous multi-scale method for the frequency response analysis of waves propagating in porous domains with a complex micro-structure. In this, the domain is decomposed onto polygonal coarse elements each clustering its local micro-structure.
A. Sreekumar, S. P. Triantafyllou, F. Chevillotte, F. X. Becot
International Journal for Numerical Methods in Engineering (2022)
We develop a finite element scheme to compute vibro-acoustic quantities from the condensed layer with these three dynamic parameters. It is further showed that the proposed scheme has high computational gain over the conventional full three-dimensional finite element approach.
U.Arasana, A.Sreekumar, F.Chevillotte, S.P.Triantafylloud, D.Chronopoulos, E.Gourdon
Journal of Sound and Vibration (2022)
We introduce a novel Virtual Element Method that resolves waves propagating in highly tesellated poroelastic domains. The projection operators corresponding to the solid, fluid, and coupling phases are establshed and discussed. A node insertion strategy is also proposed to resolve non-conforming interfaces that naturally arise in multilayered systems.
A. Sreekumar, S. P. Triantafyllou, F. Chevillotte
Computational Mechanics (2021)
We investigate the effects of tsunamis on rigid dams through numerical simulation in 2D and 3D and provide a new set of rigorous empirical equations to quantify the wave run-up height, together with the overtopping volume and depth. Novel insight on the build up of dynamic pressures also supported by new semi-empirical equations.
T. Attili, V. Heller, S. P. Triantafyllou
Coastal Engineering 169, 103942, (2021)
We introduce a novel heterogeneous multi-scale method for the consolidation analysis of two-dimensional porous domains with a complex micro-structure. A two-scale strategy is implemented wherein an arbitrary polygonal domain can be discretized into clusters of polygonal elements, each with its own set of fine scale discretization.
A. Sreekumar, S. P. Triantafyllou*, FX. Becot, F. Chevillotte
Computer Methods in Applied Mechanics and Engineering 375, 113543, (2021)
We harness the power and flexibility of phase fields to simulate anisotropic quasi-brittle fractures. Numerical implementation and experimental validation are also provided.
U. Pillai, S. P. Triantafyllou*, Y. Essa, F. M. de la Escalera
Composite Structures 252, 112635, (2020)
The performance of strengthened RC subassemblies against progressive collapse is experimentally quantified. We find that, if properly designed, NSM and TRM techniques can double the compressive arch action of RC frame subassemblies subjected to a centre column loss.
A de Arajuho Vieira, S. P. Triantafyllou* , D. B. Bournas
Engineering Structures 207, 110002, (2020)
We delivered a locking free finite element formulation for shell fractures.
U. Pillai, S. P. Triantafyllou*, I. Ashcroft, Y. Essa & F. M. de la Escalera
Computational Mechanics 65, 1413-1432 (2020)
Multi-scale heterogeneities combined with complex micro-structures? We harness the meshing flexibility of the VEM and deliver a new multiscale procedure.
A. Sreekumar S. P. Triantafyllou*, FX Bécot, F. Chevillotte
International Journal for Numerical Methods in Engineering 121, 1791-1821 (2020)
Accelerated phase field brittle fractures through numerical upscaling.
S. P. Triantafyllou*, E. G. Kakouris
International Journal for Numerical Methods in Engineering 121, 1915-1945, (2020)
We examine the effect of glass- carbon- and basalt fibre textile strengthening on the quasi-static performance of masonry arches.
FA Kariou, S. P. Triantafyllou*, D. B. Bournas
Composites Part B: Engineering, Elsevier 173, 106765, (2019)
We deliver a robust method for high-fidelity dynamic fracture simulations.
E. G. Kakouris, S. P. Triantafyllou*
Computer Methods in Applied Mechanics and Engineering, Elsevier 357, (2019)
Full List
Wave impact on rigid and flexible plates
T. Attili, V. Heller, S., Triantafyllou
Coastal Engineering (2023)
Overview on Machine Learning Assisted Topology Optimization Methodologies
Chamatidis, I., Stoumpos, M., Kazakis, G., Kallioras, N.A., Triantafyllou, S., Plevris, V., Lagaros, N.D.
In Machine Learning in Modeling and Simulation, Methods and Applications (2023)
Scaling approaches and scale effects in wave–flexible structure interaction
T. Attili, V. Heller, S., Triantafyllou
Journal of Fluids and Structures (2023)
Bond behaviour of light and heavy carbon fibre TRM to masonry interfaces
K. Makashev, S. P. Triantafyllou, G. E. Thermou, W. Tizani
Construction and Building Materials (2023)
Resolving vibro-acoustics in poroelastic media via a multiscale virtual element method
A. Sreekumar, S. P. Triantafyllou, F. Chevillotte, F. X. Becot
International Journal for Numerical Methods in Engineering (2022)
MPeat—A fully coupled mechanical-ecohydrological model of peatland development
A. W. Mahdiyasa, D. J. Large, B. P. Muljadi, M. Icardi, S. Triantafyllou
Ecohydrology (2022)
Condensed finite element scheme for symmetric multi-layer structures including dilatational motion
U.Arasana, A.Sreekumar, F.Chevillotte, S.P.Triantafylloud, D.Chronopoulos, E.Gourdon
Journal of Sound and Vibration (2022)
Virtual elements for sound propagation in complex poroelastic media
A. Sreekumar, S. P. Triantafyllou, F. Chevillotte
Computational Mechanics (2021)
A numerical investigation of tsunamis impacting dams
T. Attili, V. Heller, S. P. Triantafyllou
Coastal Engineering 169, 103942, (2021)
Multiscale VEM for the Biot consolidation analysis of complex and highly heterogeneous domains
A. Sreekumar, S. P. Triantafyllou*, FX. Becot, F. Chevillotte
Computer Methods in Applied Mechanics and Engineering 375, 113543, (2021)
An anisotropic cohesive phase field model for quasi-brittle fractures in thin fibre-reinforced composites
U. Pillai, S. P. Triantafyllou*, Y. Essa, F. M. de la Escalera
Composite Structures 252, 112635, (2020)
Strengthening of RC frame subassemblies against progressive collapse using TRM and NSM reinforcement
A de Arajuho Vieira, S. P. Triantafyllou* , D. B. Bournas
Engineering Structures 207, 110002, (2020)
Phase-field modelling of brittle fracture in thin shell elements based on the MITC4+ approach
U. Pillai, S. P. Triantafyllou*, I. Ashcroft, Y. Essa & F. M. de la Escalera
Computational Mechanics 65, 1413-1432 (2020)
A multiscale virtual element method for the analysis of heterogeneous media
A. Sreekumar S. P. Triantafyllou*, FX Bécot, F. Chevillotte
International Journal for Numerical Methods in Engineering 121, 1791-1821 (2020)
A generalized phase field multiscale finite element method for brittle fracture
S. P. Triantafyllou*, E. G. Kakouris
International Journal for Numerical Methods in Engineering 121, 1915-1945, (2020)
TRM strengthening of masonry arches: An experimental investigation on the effect of strengthening layout and textile fibre material
FA Kariou, S. P. Triantafyllou*, D. B. Bournas
Composites Part B: Engineering, Elsevier 173, 106765, (2019)
Phase-Field Material Point Method for dynamic brittle fracture with isotropic and anisotropic surface energy
E. G. Kakouris, S. P. Triantafyllou*
Computer Methods in Applied Mechanics and Engineering, Elsevier 357, (2019)
Discrete and phase field methods for linear elastic fracture mechanics: a comparative study and state-of-the-art review
A. Egger, U. Pillai, K. Agathos, E. G. Kakouris, E. N. Chatzi, I. A. Aschroft, S. P. Triantafyllou*
Applied Sciences, Multidisciplinary Digital Publishing Institute 9, 2436, (2019)
Out-of-plane response of masonry walls strengthened using textile-mortar system
F. Kariou, S. P. Triantafyllou*, D. B. Bournas, L. Koutas
Construction and Building Materials 165, 769-781, (2018)
Material point method for crack propagation in anisotropic media: A phase field approach
E. G. Kakouris, S. P. Triantafyllou
Archive of Applied Mechanics 88, 287-316, (2018)
Thermomechanical couplings in shape memory alloy materials
D. Soldatos, V. Panoskaltsis*, S. P. Triantafyllou
Continuum Mechanics and Thermodynamics 29, 805-834, (2017)
Phase-field material point method for brittle fracture
E. G. Kakouris, S. P. Triantafyllou*
International Journal for Numerical Methods in Engineering 112, 1750-1776, (2017)
On the quasi-yield surface concept in plasticity theory
D. Soldatos, S. P. Triantafyllou
ZAMM-Journal of Applied Mathematics and Mechanics/Zeitschrift für Angewandte Mathematik und Mechanik 97, 961-972, (2017)
An enhanced scaled boundary finite element method for linear elastic fracture
A. Egger, E. N. Chatzi, S. P. Triantafyllou
Archive of Applied Mechanics 87, 1667-1706, (2017)
A discontinuous extended Kalman filter for non-smooth dynamic problems
M. N. Chatzis, E. N. Chatzi, S. P. Triantafyllou
Mechanical systems and signal processing 92, 13-29, (2017)
Logarithmic spin, logarithmic rate and material frame-indifferent generalized plasticity
D. Soldatos, S. P. Triantafyllou
International Journal of Applied Mechanics 8, 2016
A hysteretic multiscale formulation for validating computational models of heterogeneous structures
S. P. Triantafyllou*, E. N. Chatzi
The Journal of Strain Analysis for Engineering Design 51, 46-62, (2016)
Invariance in non-isothermal generalized plasticity
V. P. Panoskaltsis*, D. Soldatos, S. P. Triantafyllou
Acta Mechanica, Springer Vienna 226, 931-954, (2015)
On phase transformations in shape memory alloy materials and large deformation generalized plasticity
V. P. Panoskaltsis*, D. Soldatos, S. P. Triantafyllou
Continuum Mechanics and Thermodynamics 26, 811-831, (2014)
A hysteretic multiscale formulation for nonlinear dynamic analysis of composite materials
S. P. Triantafyllou*, E. N. Chatzi
Computational Mechanics 54, 763-787, (2014)
Small and large displacement dynamic analysis of frame structures based on hysteretic beam elements
S. P. Triantafyllou, V. K. Koumousis
Journal of Engineering Mechanics, ASCE 138, 36-49, (2012)
Bouc-Wen type hysteretic plane stress element
S. P. Triantafyllou, V. K. Koumousis
Journal of Engineering Mechanics, ASCE 138, 235-246, (2012)
An hysteretic quadrilateral plane stress element
S. P. Triantafyllou, V. K. Koumousis
Archive of Applied Mechanics 82, 1675-1687, (2012)
The concept of physical metric in rate-independent generalized plasticity
V. P. Panoskaltsis*, D. Soldatos, S. P. Triantafyllou
Acta mechanica, Springer Vienna 221, 49, (2011)