A5074105728- Mechanical Behavior of Composites
- Fatigue and fracture mechanics
- Structural Response to Dynamic Loads
- Structural Behavior of Reinforced Concrete
- Orthopaedic implants and arthroplasty
- Non-Destructive Testing Techniques
- Mechanical Failure Analysis and Simulation
- Fault Detection and Control Systems
- High-Velocity Impact and Material Behavior
- Composite Structure Analysis and Optimization
- Structural Health Monitoring Techniques
- Transportation Safety and Impact Analysis
- Structural Integrity and Reliability Analysis
- Laser Material Processing Techniques
- Probabilistic and Robust Engineering Design
- Mechanical stress and fatigue analysis
- Advanced Measurement and Detection Methods
- Aerosol Filtration and Electrostatic Precipitation
- Dynamics and Control of Mechanical Systems
- Cellular and Composite Structures
- Fiber-reinforced polymer composites
- Vehicle emissions and performance
- Topology Optimization in Engineering
- Advanced Theoretical and Applied Studies in Material Sciences and Geometry
- Coronary Interventions and Diagnostics
University of Patras
2018-2024
Imperial College London
2010-2023
A combined computational and experimental study of 3D-printed scaffolds made from hybrid nanocomposite materials for potential applications in bone tissue engineering is presented. Polycaprolactone (PCL) polylactic acid (PLA), enhanced with chitosan (CS) multiwalled carbon nanotubes (MWCNTs), were investigated respect their mechanical characteristics responses fluidic environments. novel scaffold geometry was designed, considering the requirements cellular proliferation properties. Specimens...
This paper reports on a study of the damage tolerance carbon fibre re- inforced polymer plates, used in aircraft fuselage, subjected to multi-site impacts. A new fixture was designed perform sequential low-velocity im- pacts at different locations plates with two thicknesses, represent- ing upper and lower fuselage panels. The residual strength compression measured using compression-after-impact rig prevent global buckling thin plates. Experimental results indicated that compared single...
Low velocity impacts in CFRP’s structures cause a variation of size, type and area damages thus different types repair methods have to take place. For an ensured controlled selection, numerical models be developed verified against the acquired experimental results. Also, automation procedure can increase repeatability safety. University Patras (AML Group) automated manipulator for composite that reached TRL-4. This remove material various depths shapes with aid laser module could behave...
In this work the effectiveness of stepped repairs to damaged fiber reinforced composite materials is investigated by using previously validated numerical models which were compared with tested repaired plates. Parametric studies carried out in order assess scarf ratio (i.e., step length ply thickness ratio) influence on ultimate forces, displacements, stresses and stiffnesses. FE repair ratios varying from value 20 60 a increase 10 developed. The allowed direct comparison that had strength...
The present study aims to investigate the influence of multi-walled carbon nanotubes (MWCNTs) on damage tolerance after impact (CAI) development Out Autoclave (OoA) fibre reinforced polymer (CFRP) laminates. introduction MWCNTs into structure CFRPs has been succeeded by adding nanotube-enriched sizing agent for pre-treatment preform and using an in-house developed methodology that can be easily scaled up. modified laminates with 1.5 wt.% were subjected low velocity at three energy levels (8,...
This paper deals with the development of an innovative approach for inspection and repair damage in aeronautical composites that took place first two years H2020 CompInnova project which. The aim is a newly designed robotic platform autonomous using combined infrared thermography (IRT) phased array (PA) non-destructive investigation detection characterization, while integrated laser capabilities. will affect increasing societal need safer aircraft lowest possible cost, new effective...
Abstract The increasing number of constellation satellites requires re-thinking the design and manufacturing process for reaction wheel rotors. Mass optimisation rotors leads to cost reduction performance increase. Those optimisations can be realised by taking ideas from nature. Therefore, principles diatoms were screened, abstracted implemented in an algorithm-based process. In this way, a bio-inspired rotor was created, which considers launch in-operation loads, is capable up 7500 RPM...
In this study, tests were carried out on repaired 300 × 250 mm composite stiffened panels. The initial damage was assumed to be extended in a depth of the first six plies and repair with scarf ratio 1:50 employed. A circular took place, utilizing laser-assisted ablation wet patches approach. panels tested compression Digital Image Correlation (DIC) Acoustic Emission (AE) used order monitor initiation propagation addition, Phased Array (PA) patch failure. Detailed Finite Elements (FE) models...
In this study, experimental tests and numerical simulations (Abaqus) were performed to examine the durability of four impeller materials [steel, polyethylene, polypropylene glass fiber reinforced polymer (GFRP)] in an anaerobic digester environment. Specimens these prepared immersed a bath containing liquor while operated at 40 °C for period 8 months. Periodically (2, 4, 6 months) sample specimens removed from tensile strength elastic modulus determined. As expected, thermoplastic especially...
Biogas upgrading to biomethane is commonly performed by alkaline chemical scrubbing.Four different types of materials were examined in the present work.Materials as steel (St-37), polyethylene, polypropylene and glass fiber reinforced polymer (GFRP) immersed environment for a period 6 months.Extensive experimental analysis has been executed properties such tensile strength Young's modulus have determined verified numerical using Abaqus software.During analysis, geometrically linear nonlinear...
This study focuses on investigating the behavior of a thermoplastic matrix composite (Carbon Fiber-LMPAEK) under bearing strength determination test. The specimens were subjected to double-shear-bolted joint configuration tensile test, and propagation damage was monitored using extensometers. research employs technique that involves inelastic modelling considers discrepancies in layer interfaces better understand propagation. In this context, cohesive utilized all layers, Hashin law applied....
This study aimed to optimize the geometry of composite stepped repair patches, using a parametric algorithm automate process due complexity optimization problem and various factors affecting efficiency. More specifically, initially calculates equivalent strengths repaired laminate plate according max stress criterion, then dimensions several elliptical taking into account design methods extracted from literature. Next, it creates their finite element models finally, code conducts an...
The reduction in the inner diameter of artery due to creation atheromatic plaque on lumen, known as stenosis, disrupts blood flow, leading medical complications, which can be fatal. angioplasty procedure aims reopen and uses a stent keep it open. In this study, an effort is made determine point stent, during expansion phase using silico Finite Element Analysis method. A literature-based design was chosen for geometry, whereas simplified shapes balloon two layers were used. Additionally,...