RG
Authored
14 records found
Synthetic image data augmentation for fibre layup inspection processes
Techniques to enhance the data set
In the aerospace industry, the Automated Fiber Placement process is an established method for producing composite parts. Nowadays the required visual inspection, subsequent to this process, typically takes up to 50% of the total manufacturing time and the inspection quality stron
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Review of image segmentation techniques for layup defect detection in the Automated Fiber Placement process
A comprehensive study to improve AFP inspection
The aerospace industry has established the Automated Fiber Placement process as a common technique for manufacturing fibre reinforced components. In this process multiple composite tows are placed simultaneously onto a tool. Currently in such processes manual testing requires oft
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Shearography non-destructive testing of thick GFRP laminates
Numerical and experimental study on defect detection with thermal loading
Thick composite materials are commonly used as load-bearing structures in marine applications. Developing a suitable and sophisticated non-destructive testing (NDT) method for thick composites is an urgent challenge to improve the safety, reliability and maintenance of these stru
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Extreme shearography
Development of a high-speed shearography instrument for quantitative surface strain measurements during an impact event
Monitoring of extreme dynamic loadings on composite materials with high temporal and spatial resolution provides an important insight into the understanding of the material behaviour. Quantitative measurement of the surface strain at the first moments of the impact event may reve
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Predictive maintenance, as one of the core components of Industry 4.0, takes a proactive approach to maintain machines and systems in good order to keep downtime to a minimum and the airline maintenance industry is not an exception to this. To achieve this goal, practices in Stru
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Imaging sensor data modelling and evaluation based on optical composite characteristics
Investigation of data quality for inline inspection
Automated Fibre Placement is a common manufacturing technique for composite parts in the aero-space industry. Therefore, a visual part inspection is required which often covers up to 50% of the actual production time. Moreover, the inspection quality of this manual step fluctuate
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Application of shearography and the percussion method for the structural inspection of wall paintings
A case study of St. Christopher in Maria Church, Nisse
Structural delamination in mural paintings is a complex phenomenon and is considered among the most frequent types of damage. In conservation practice, the most common technique to identify structural detachments is the percussion method. Full-field optical techniques based on in
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EXTREME shearography
Development of a high-speed shearography instrument for measurements of the surface strain components during an impact event
This work presents the design and preliminary results of a high-speed shearography instrument in development for surface strain components measurements during an impact event. Composite materials are vulnerable to extreme dynamic loadings such as blade off events or foreign objec
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EXTREME shearography
High-speed shearography instrument for in-plane surface strain measurements during an impact event
This work presents the design and the latest experimental results on the surface strain measurements during an impact event obtained with the EXTREME high-speed shearography instrument. The shearography technique is used in this project to provide a quantitative measurement of th
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DeepSHM
A deep learning approach for structural health monitoring based on guided Lamb wave technique
In our previous work, we demonstrated how to use inductive bias to infuse a convolutional neural network (CNN) with domain knowledge from fatigue analysis for aircraft visual NDE. We extend this concept to SHM and therefore in this paper, we present a novel framework called DeepS
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Evaluation of the mechanical performance of a composite multi-cell tank for cryogenic storage
Part II – Experimental assessment
This study focuses on the understanding of the thermal and structural behavior of an innovative Type IV multi-spherical composite-overwrapped pressure vessel through an experimental assessment that consists of hydrostatic testing at ambient conditions and pressure cycling with a
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Incorporating Inductive Bias into Deep Learning
A Perspective from Automated Visual Inspection in Aircraft Maintenance
The near-term artificial intelligence, commonly referred as ‘weak AI’ in the last couple years was achieved thanks to the advances in machine learning (ML), particularly deep learning, which has currently the best in-class performance outperforming other machine learning algorith
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Towards hydrogen fueled aircraft
Metal hydrides for optical hydrogen sensors operating above room temperature
Palladium thin films have been studied as hydrogen sensing materials and applied to variety of optical hydrogen sensors. Recently, tantalum has emerged as an attractive option for hydrogen sensing materials due to its broad sensing range and flexibility in tuning the sensing rang
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Towards hydrogen fueled aircraft
Metal hydrides for optical hydrogen sensors operating above room temperature
Palladium thin films have been studied as hydrogen sensing materials and applied to variety of optical hydrogen sensors. Recently, tantalum has emerged as an attractive option for hydrogen sensing materials due to its broad sensing range and flexibility in tuning the sensing rang
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Contributed
6 records found
Assessment of bolted connections for supporting structures of offshore wind turbine towers
Mechanical performance and structural health monitoring
In the past two decades, offshore wind has emerged as a new source of renewable energy. This highlights the requirement for the utilisation of larger and more efficient offshore wind turbines (OWTs). The connections used in support structures of OWTs are critical to ensure the ex
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Dynamic continuous fiber optical strain sensing for damage diagnosis on beam-like composite structures
An experimental and numerical study
The objective of this master project is to improve the current SHM techniques for global damage identification of beam-like composite structures. The studied damage diagnosis method is based on structural vibrations from which the modal parameters are obtained. The literature stu
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Assessing the Impact Damage Risk on Composite Structures
A method of predicting impact damage risk on composite aircraft fuselage by combining probability of detection and a decision risk matrix
Impact on composite structures shows a different damage behaviour compared to metal structures. Due to the current short operational life time of composite aircraft the risks of impact damages on composite structures are unknown. This paper proposes a new method for quantitative
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Developing a level-1B qualifiable CNN for in-situ ultrasonic damage classification of aerospace composite structures
An in-depth evaluation on the end-to-end process of developing a data-driven tool
This paper examines the end-to-end development process for a Convolution Neural Network (CNN) based damage classification tool for ultrasonic inspection of aerospace-grade composite structures. The recent advent of Artificial Intelligence (AI) and Machine Learning (ML) has piqued
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Accurate structural health monitoring in composites
With fibre Bragg grating sensors
Compared to metals, composite materials offer higher stiffness, more resilience to corrosion, have lighter weights, and their mechanical properties can be tailored by their layup configuration. Despite these features, composite materials are susceptible to a diversity of damages,
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AI-Assisted Design & Optimization for Predictive Maintenance
A Case Study using Deep Learning and Search Metaheuristics for Structural Health Monitoring in Aviation
One of the classical solutions to maintain the aircraft structural integrity is to rely on the analysis of non-destructive testing (NDT) inspector with various inspection methods. However, it is relatively expensive in matter of time and costs to train human resources until the c
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