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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Sinapius, Michael
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (36/36 displayed)
- 2023Processing of 3-(Trimethoxysilyl)propyl Methacrylate (TMSPM) Functionalized Barium Titanate/Photopolymer Composites: Functionalization and Process Parameter Investigationcitations
- 2023The Guided Ultrasonic Wave Oscillation Phase Relation between the Surfaces of Plate-like Structures of Different Material Settingscitations
- 2023Investigations on Guided Ultrasonic Wave Dispersion Behavior in Fiber Metal Laminates Using Finite Element Eigenvalue Analysiscitations
- 2023Characterization of UV Light Curable Piezoelectric 0-0-3 Composites Filled with Lead-Free Ceramics and Conductive Nanoparticlescitations
- 2022Polyetherimide-Reinforced Smart Inlays for Bondline Surveillance in Composites
- 2022MEMS Vibrometer for Structural Health Monitoring Using Guided Ultrasonic Wavescitations
- 2022A Computational Geometric Parameter Optimization of the Thermomechanical Deicing Conceptcitations
- 2022Influence of a Flat Polyimide Inlay on the Propagation of Guided Ultrasonic Waves in a Narrow GFRP-Specimencitations
- 2022Piezoelectric Ceramic/Photopolymer Composites Curable with UV Light: Viscosity, Curing Depth, and Dielectric Propertiescitations
- 2021Reducing the Weakening Effect in Fibre-Reinforced Polymers Caused by Integrated Film Sensorscitations
- 2021Measurement of Two-Dimensional Electrical Potential Fields in CFRP using Four-Probe Resistance Scanscitations
- 2021Space-Filling Curve Resistor on Ultra-Thin Polyetherimide Foil for Strain Impervious Temperature Sensingcitations
- 2021Characterization 0.1 wt.% Nanomaterial/Photopolymer Composites with Poor Nanomaterial Dispersion: Viscosity, Cure Depth and Dielectric Propertiescitations
- 2020Parameter study and experimental analysis of a thermo-mechanical de-icing conceptcitations
- 2020Adhesion of Multifunctional Substrates for Integrated Cure Monitoring Film Sensors to Carbon Fiber Reinforced Polymerscitations
- 2019Influence of fused deposition modeling process parameters on the transformation of 4D printed morphing structurescitations
- 2018Ultrasonic Wave Propagation in Aerospace Structures: Highly Efficient Simulation with a Minimal Model
- 2018Pulse Ultrasonic Cure Monitoring of the Pultrusion Processcitations
- 2016Degradation analysis of fibre-metal laminates under service conditions to predict their durability
- 2016Actuation mechanisms of carbon nanotube-based architectures
- 2016Damage Reconstruction in Complex Composite Structures using Lamb Waves
- 2016Experimental investigations on residual stresses during the fabrication of intrinsic CFRP-steel laminates
- 2016Structural integrated sensor and actuator systems for active flow controlcitations
- 2015ACTUATED TENSILE TESTING OF CNT BASED ARCHITECTURES
- 2015Lamb Wave Propagation in Complex Geometries - A Minimal Model Approach
- 2014Resonant approach for testing glass-fiber-reinforced composites in the VHCF-regime
- 2014MEMS Pressure Sensors Embedded into Fiber Composite Airfoilscitations
- 2014Mode Selective Actuator-Sensor System for Lamb Wave-Based Structural Health Monitoring
- 2014Investigating the VHCF of composite materials using new testing methods and a new fatigue damage model
- 2014Carbon Nanotube Strain Measurements via Tensile Testing
- 2014Active Flow Control via Piezo-Actuated Airfoils for High-Lift
- 2013Magnetostrictive properties of epoxy resins modified with Terfenol-D particles for detection of internal stress in CFRP. Part 2: evaluation of stress detectioncitations
- 2013A Dynamical Actuated Lip at a Blowing Slot for Active High-Lift
- 2013Design of mode selective actuators for Lamb wave excitation in composite platescitations
- 2012Experimental investigation of the very high cycle fatigue behaviour of fibre reinforced composites
- 2012Characterization of mode selective actuator and sensor systems for Lamb wave excitation
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document
Lamb Wave Propagation in Complex Geometries - A Minimal Model Approach
Abstract
Maintenance of aircraft structures is time consuming and thus expensive. Several factors contribute to this, for instance a lack of automation. Furthermore, inspection methods for emerging materials, like carbon fiber reinforces polymers (CFRP), are not yet mature. Uncertainties regarding the long time behavior of damaged and undamaged CFRP lead to high safety margins in structural design. A system for online inspection of large areas could be a solution to this. Different methods for structural health monitoring (SHM) have been explored in the last decades, but active systems with ultrasonic waves are the most promising ones. Interactions in the aircraft structure result in complex wave fields and damage induced signal changes are hard to identify. Simulations could help understand wave propagation, but neither commercial programs nor any known algorithm currently in development can handle these dynamic processes for large areas in acceptable times. All these methods use detailed models to consider all relevant influences.Contrary to this, a minimal model is proposed to simulate Lamb wave propagation in complex geometries. Model reduction is achieved by approximation of repeatedly used structural elements, like stiffeners. The model consists of areas with individual material properties and specific boundary conditions at their border. Interaction behavior at these inhomogeneities is calculated beforehand and summarized with few characteristic values. The most important parameters are transmission, reflection and the conversion of different wave modes. Ray tracing is used to find the fastest paths in the structure between two arbitrary points, i.e. actuator and sensor. The gained information and material specific values are used to calculate the time signal. This approximate method could be used is SHM systems to adapt reference signals to changing environmental conditions, as intelligent reference signal or to optimize actuator sensor networks.