Search Results - "Constantine, David"

Metal 3D-Printed Bioinspired Lattice Elevator Braking Pads for Enhanced Dynamic Friction Performance by Kladovasilakis, Nikolaos, Pechlivani, Eleftheria Maria, Sfampa, Ioanna K, Tsongas, Konstantinos, Korlos, Apostolos, David, Constantine, Tzovaras, Dimitrios

“…The elevator industry is constantly expanding creating an increased demand for the integration of high technological tools to increase elevator efficiency and…”
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In Situ Investigation of Tensile Response for Inconel 718 Micro-Architected Materials Fabricated by Selective Laser Melting by Kyriakidis, Ioannis Filippos, Kladovasilakis, Nikolaos, Pechlivani, Eleftheria Maria, Korlos, Apostolos, David, Constantine, Tsongas, Konstantinos

“…Topology optimization enables the design of advanced architected materials with tailored mechanical properties and optimal material distribution. This method…”
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A Coherent Assessment of the Compressive Strain Rate Response of PC, PETG, PMMA, and TPU Thermoplastics in MEX Additive Manufacturing by Petousis, Markos, Ntintakis, Ioannis, David, Constantine, Sagris, Dimitrios, Nasikas, Nektarios K., Korlos, Apostolos, Moutsopoulou, Amalia, Vidakis, Nectarios

“…In this study, we successfully address a significant research and engineering gap by quantitatively assessing the impact of varying compressive loading rates…”
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The effect of six key process control parameters on the surface roughness, dimensional accuracy, and porosity in material extrusion 3D printing of polylactic acid: Prediction models and optimization supported by robust design analysis by Vidakis, Nectarios, David, Constantine, Petousis, Markos, Sagris, Dimitrios, Mountakis, Nikolaos, Moutsopoulou, Amalia

“…In the material extrusion (MEX) Additive Manufacturing (AM) technology, the layer-by-layer nature of the fabricated parts, induces specific features which…”
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Operational Performance and Energy Efficiency of MEX 3D Printing with Polyamide 6 (PA6): Multi-Objective Optimization of Seven Control Settings Supported by L27 Robust Design by David, Constantine, Sagris, Dimitrios, Petousis, Markos, Nasikas, Nektarios K., Moutsopoulou, Amalia, Sfakiotakis, Evangelos, Mountakis, Nikolaos, Charou, Chrysa, Vidakis, Nectarios

“…Both energy efficiency and robustness are popular demands for 3D-printed components nowadays. These opposing factors require compromises. This study examines…”
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Biomedical Composites of Polycaprolactone/Hydroxyapatite for Bioplotting: Comprehensive Interpretation of the Reinforcement Course by Petousis, Markos, Michailidis, Nikolaos, Korlos, Apostolos, Papadakis, Vassilis, David, Constantine, Sagris, Dimitrios, Mountakis, Nikolaos, Argyros, Apostolos, Valsamos, John, Vidakis, Nectarios

“…Robust materials in medical applications are sought after and researched, especially for 3D printing in bone tissue engineering. Poly[ε-caprolactone] (PCL) is…”
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A non-intrusive space-time interpolation from compact Stiefel manifolds of parametrized rigid-viscoplastic FEM problems by Friderikos, Orestis, Olive, Marc, Baranger, Emmanuel, Sagris, Dimitris, David, Constantine

“…This work aims to interpolate parametrized reduced order model (ROM) basis constructed via the proper orthogonal decomposition (POD) to derive a robust ROM of…”
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Optimization Course of Titanium Nitride Nanofiller Loading in High-Density Polyethylene: Interpretation of Reinforcement Effects and Performance in Material Extrusion 3D Printing by Petousis, Markos, Sagris, Dimitris, Papadakis, Vassilis, Moutsopoulou, Amalia, Argyros, Apostolos, David, Constantine, Valsamos, John, Spiridaki, Mariza, Michailidis, Nikolaos, Vidakis, Nectarios

“…In this study, titanium nitride (TiN) was selected as an additive to a high-density polyethylene (HDPE) matrix material, and four different nanocomposites were…”
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Silicon Carbide Nanoparticles as a Mechanical Boosting Agent in Material Extrusion 3D-Printed Polycarbonate by Petousis, Markos, Vidakis, Nectarios, Mountakis, Nikolaos, Grammatikos, Sotirios, Papadakis, Vassilis, David, Constantine N., Moutsopoulou, Amalia, Das, Subrata C.

“…In this work, the effect of silicon carbide (carborundum, SiC), as a boosting agent of the mechanical response of the polycarbonate (PC) polymer, was…”
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Why Rehabilitation must have priority during and after the COVID-19-pandemic: A position statement of the Global Rehabilitation Alliance by Gutenbrunner, Christoph, Stokes, Emma K, Dreinhöfer, Karsten, Monsbakken, Jan, Clarke, Stephanie, Côté, Pierre, Urseau, Isabelle, Constantine, David, Tardif, Claude, Balakrishna, Venkatesh, Nugraha, Boya

“…COVID-19 has become a pandemic with strong influence on health systems. In many cases it leads to a disruption of rehabilitation service provision. On the…”
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Mechanical Performance over Energy Expenditure in MEX 3D Printing of Polycarbonate: A Multiparametric Optimization with the Aid of Robust Experimental Design by Vidakis, Nectarios, Petousis, Markos, David, Constantine N., Sagris, Dimitrios, Mountakis, Nikolaos, Karapidakis, Emmanuel

“…Sustainability and energy efficiency of additive manufacturing (AM) is an up-to-date industrial request. Likewise, the claim for 3D-printed parts with capable…”
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Development and Optimization of Medical-Grade Multi-Functional Polyamide 12-Cuprous Oxide Nanocomposites with Superior Mechanical and Antibacterial Properties for Cost-Effective 3D Printing by Vidakis, Nectarios, Petousis, Markos, Michailidis, Nikolaos, Grammatikos, Sotirios, David, Constantine N, Mountakis, Nikolaos, Argyros, Apostolos, Boura, Orsa

“…In the current study, nanocomposites of medical-grade polyamide 12 (PA12) with incorporated copper (I) oxide (cuprous oxide-Cu O) were prepared and fully…”
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A Space-Time POD Basis Interpolation on Grassmann Manifolds for Parametric Simulations of Rigid-Viscoplastic FEM by Friderikos, Orestis, Olive, Marc, Baranger, Emmanuel, Sagris, Dimitrios, David, Constantine N.

“…Parametric simulations of thermomechanical metal forming processes still remain computational costly and difficult due to inherent strong non-linearities. To…”
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Machinability of Eco-Friendly Lead-Free Brass Alloys: Cutting-Force and Surface-Roughness Optimization by Toulfatzis, Anagnostis I, Pantazopoulos, George A, David, Constantine N, Sagris, Dimitrios S, Paipetis, Alkiviadis S

“…The machinability in turning mode of three lead-free brass alloys, CuZn42 (CW510L), CuZn38As (CW511L) and CuZn36 (C27450) was evaluated in comparison with a…”
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A Comprehensive Optimization Course of Antimony Tin Oxide Nanofiller Loading in Polyamide 12: Printability, Quality Assessment, and Engineering Response in Additive Manufacturing by Nasikas, Nektarios K, Petousis, Markos, Papadakis, Vassilis, Argyros, Apostolos, Valsamos, John, Gkagkanatsiou, Katerina, Sagris, Dimitrios, David, Constantine, Michailidis, Nikolaos, Maravelakis, Emmanuel, Vidakis, Nectarios

“…This study aimed to investigate the potential of antimony-doped tin oxide (ATO) as a reinforcing agent for polyamide 12 (PA12) in 3D printing by examining four…”
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Affordable Biocidal Ultraviolet Cured Cuprous Oxide Filled Vat Photopolymerization Resin Nanocomposites with Enhanced Mechanical Properties by Petousis, Markos, Vidakis, Nectarios, Velidakis, Emmanuel, Kechagias, John D, David, Constantine N, Papadakis, Stefanos, Mountakis, Nikolaos

“…In this study, Cuprous Oxide (Cu O), known for its mechanism against bacteria, was used as filler to induce biocidal properties on a common commercial resin…”
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Energy consumption versus strength in MEΧ 3D printing of polylactic acid by Vidakis, Nectarios, Petousis, Markos, Karapidakis, Emmanuel, Mountakis, Nikolaos, David, Constantine, Sagris, Dimitrios

“…The cost-effectiveness and the environmental impact of Additive Manufacturing (AM) are nowadays two of the hottest process-related industrial and research…”
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Experimental Analysis of the Effect of Vibration Phenomena on Workpiece Topomorphy Due to Cutter Runout in End-Milling Process by David, Constantine, Sagris, Dimitrios, Stergianni, Evlampia, Tsiafis, Christos, Tsiafis, Ioannis

“…Profile end-milling processes are very susceptible to vibrations caused by cutter runout especially when it comes to operations where the cutter diameter is…”
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Final Heat Treatment as a Possible Solution for the Improvement of Machinability of Pb-Free Brass Alloys by Toulfatzis, Anagnostis, Pantazopoulos, George, David, Constantine, Sagris, Dimitrios, Paipetis, Alkiviadis

“…Heat treatment was performed in order to improve the machinability of three lead-free extruded and drawn brasses, namely CuZn42 (CW510L), CuZn38As (CW511L),…”
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On the Hausdorff Dimension of CAT(κ) Surfaces by Constantine, David, Lafont, Jean-François

“…We prove that a closed surface with a CAT(κ) metric has Hausdorff dimension = 2, and that there are uniform upper and lower bounds on the two-dimensional…”
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