• Conference Object  

      3-D flow of Herschel-Bulkley fluids 

      Burgos, Gilmer R.; Alexandrou, Andreas N. (ASME, 1998)
      The flow of Herschel-Bulkley fluids through a sudden 3-D square with expansion height ratio of 2:1 is studied numerically by solving the mass and momentum conservation equations along with a continuous constitutive relation. ...
    • Conference Object  

      Active earth thrust on walls supporting granular soils: Effect of wall movement 

      Loukidis, D.; Salgado, R. (IOS Press, 2013)
      The methods currently used in the design practice of retaining walls supporting granular soils (sand, gravel, silt, and their mixtures) assume that the soil friction angle and, consequently, the active earth pressure ...
    • Article  

      Alignment of electrospun polymer fibers using a concave collector 

      Savva, I.; Evaggelou, E.; Papaparaskeva, G.; Leontiou, T.; Stylianopoulos, T.; Mpekris, F.; Stylianou, K.; Krasia-Christoforou, T. (2015)
      During recent years, electrospinning has become a powerful technique for the cost-effective production of fibrous materials with diameters ranging from a few nanometers up to a few micrometers. In a conventional electrospinning ...
    • Article  

      Bearing capacity in sand under eccentric and inclined loading using a bounding surface plasticity model 

      Loukidis, D.; Ygeionomaki, N. (2017)
      The bearing capacity of strip footings on sand under inclined or eccentric loading is investigated using finite element analysis. The sand behavior is simulated using a bounding surface plasticity constitutive model based ...
    • Conference Object  

      Compression molding of semi-concentrated fiber suspensions: Flow and fiber orientation 

      Ahmed, Alauddin; Alexandrou, Andreas N. (Publ by ASME, 1993)
      The focus of this paper is compression molding of semi-concentrated fiber suspensions. During compression molding a premeasured amount of raw material (charge) is placed between two halves of a die. The die is then closed ...
    • Article  

      Compression molding using a generalized eulerian–lagrangian formulation with automatic remeshing 

      Ahmed, A.; Alexandrou, Andreas N. (1992)
      A generalized Eulerian‐Lagrangian approach is used to study the compression molding of viscoelastic polymers. The complete, unsteady, two‐dimensional equations of motion are used in the analysis. The White–Metzner model ...
    • Conference Object  

      Control of quantized multi-agent systems with linear nearest neighbor rules: A finite field approach 

      Sundaram, S.; Hadjicostis, Christoforos N. (2010)
      We study the problem of controlling a multi-agent system where each agent is only allowed to be in a discrete and finite set of states. Each agent is capable of updating its state based on the states of its neighbors, and ...
    • Conference Object  

      Effects of periodic gravity modulation in microgravity convection systems 

      Cyr, Martha N.; Alexandrou, Andreas N.; Olinger, D. J. (Publ by ASME, 1993)
      Natural convection in an enclosure that is subjected to periodic excitations is investigated using a classical mixed Galerkin finite element method. The modulation is incorporated in the momentum equations, through a ...
    • Article  

      Flow development in compression of a finite amount of a Bingham plastic 

      Florides, G. C.; Alexandrou, Andreas N.; Georgiou, G. C. (2007)
      The flow and shape evolution during the compression of a finite amount of a Bingham plastic is investigated by means of numerical simulations. The problem relates to the popular compression test used for the rheological ...
    • Conference Object  

      Injection molding of dilute and semi-dilute fiber suspensions 

      Alexandrou, Andreas N.; Ahmed, Alauddin (Publ by ASME, 1992)
      The focus of this paper is unsteady flow of semi-dilute fiber suspensions in complex geometries. These flows are typical of injection molding problems in which the raw material in granular form, usually plastic resin mixed ...
    • Doctoral Thesis  Open Access

      Investigation of the response and behaviour of ancient columns and colonnades under seismic excitations using the discrete element method 

      Papaloizou, Loizos (Πανεπιστήμιο Κύπρου, Πολυτεχνική Σχολή / University of Cyprus, Faculty of Engineering, 2009-05)
      Η διερεύνηση της σεισμικής συμπεριφοράς αρχαίων μνημειακών κατασκευών με σπονδυλωτούς κίονες παρουσιάζει μεγάλο επιστημονικό ενδιαφέρον αφού η απόκρισή τους περιέχει εξαιρετικά σύνθετα φαινόμενα λικνισμού και ολισθήσεων. ...
    • Article  

      Microstructure-based, multiscale modeling for the mechanical behavior of hydrated fiber networks 

      Barocas, V. Η; Chandran, P. L.; Stylianopoulos, T. (2008)
      A multiscale formulation is derived for the mechanics of a dilute fiber network microstructure, as occurs in in vitro reconstituted collagen gels, to accommodate the deterministic solution of a uniform-stress condition in ...
    • Conference Object  

      MIMO disturbance and plant uncertainty attenuation by feedback 

      Djouadi, S. M.; Charalambous, Charalambos D. (2002)
      This paper investigates the ability of feedback to reduce plant and disturbance uncertainties in the MIMO case, by solving two fundamental problems posed by Zames in the late seventies. The approach used here is Banach ...
    • Article  

      Modelling and Simulation of Bolted Joints under Harmonic Excitation 

      Oldfield, M.; Ouyang, H.; Mottershead, J. E.; Kyprianou, Andreas (2003)
      Bolted metal joints under harmonic loading exhibit hysteretic behaviour. This is the major source of damping in frame structures with bolted joints, since the material damping of these structures is very small. In this ...
    • Doctoral Thesis  Open Access

      Modelling of fluid driven fractures in cohesive poroelastoplastic formations 

      Sarris, Ernestos N. (Πανεπιστήμιο Κύπρου, Πολυτεχνική Σχολή / University of Cyprus, Faculty of Engineering, 2011-05)
      Το πρόβλημα της υδραυλικής ρωγμής συναντάται στη τεχνική της υδραυλικής θραύσης, που εφαρμόζεται από την πετρελαϊκή βιομηχανία για την αύξηση της ανάκτησης υδρογονανθράκων. Κατά την εφαρμογή της τεχνικής, προσοχή δίδεται ...
    • Article  

      Multiscale modelling of solid tumour growth: the effect of collagen micromechanics 

      Wijeratne, P. A.; Vavourakis, V.; Hipwell, J. H.; Voutouri, C.; Papageorgis, P.; Stylianopoulos, T.; Evans, A.; Hawkes, D. J. (2016)
      Here we introduce a model of solid tumour growth coupled with a multiscale biomechanical description of the tumour microenvironment, which facilitates the explicit simulation of fibre–fibre and tumour–fibre interactions. ...
    • Article  

      Multiscale, structure-based modeling for the elastic mechanical behavior of arterial walls 

      Barocas, V. Η; Stylianopoulos, T. (2007)
      Passive elastic behavior of arterial wall remains difficult to model. Although phenomenological and structural models exist, the question of how the three-dimensional network structure of the collagen in the artery determines ...
    • Article  

      Permeability calculations in three-dimensional isotropic and oriented fiber networks 

      Barocas, V. Η; Stylianopoulos, T.; Yeckel, A.; Derby, J. J.; Luo, X.-J.; Shephard, M. S.; Sander, E. A. (2008)
      Hydraulic permeabilities of fiber networks are of interest for many applications and have been studied extensively. There is little work, however, on permeability calculations in three-dimensional random networks. Computational ...
    • Conference Object  

      Rheological effects of strusture breakdown in semisolid slurries 

      Alexandrou, Andreas N.; Florides, G. C.; Georgiou, G. C.; Apelian, D. (Affiliation: Department of Mechanical and Industrial Engineering, University Cyprus, P.O.Box 20537, 1678 Nicosia, CyprusAffiliation: Department of Mathematics and Statistics, University of Cyprus, P.O.Box 20537, 1678 Nicosia, CyprusAffiliation: Metal Processing Institute, WPI, Worcester, MA, United StatesCorrespondence Address: Alexandrou, A.N.Department of Mechanical and Industrial Engineering, University Cyprus, P.O.Box 20537, 1678 Nicosia, Cyprus, 2004)
      An essential element for the integration of the semisolid metal (SSM) process in the production of complex commercial components is the availability of accurate mathematical and computational tools that could describe both ...
    • Conference Object  

      Sedimentation of heavy crystal particles under microgravity conditions 

      Alexandrou, Andreas N.; Gatsonis, N. A.; Shi, H.; Sacco, A. (American Institute of Aeronautics and Astronautics Inc, AIAA, 1998)
      Crystals grown from specially prepared liquid solutions have important industrial applications such as in biochemical processes, refining etc. The efficiency of these crystals is usually a function of their size. Therefore, ...