Current Students

Lucy Dougill

University: Bristol Supervisors: Professor Anthony Croxford & Professor Paul Wilcox 

PhD Project: Visual Vibrometry and its Application to NDT Through the Use of Various Video and Signal Processing Techniques 

The aim of my project is to explore how large area visual monitoring approaches may be employed to monitor the state of structures through combining the use of ultrasonic guided waves and visual systems. The combination of the visual systems ability to monitor large areas and ultrasonic guided waves ability to penetrate parts at depth that provide additional useful information regarding the structural health of a specimen. 

One key focus is to investigate how the sensitivity of the visual methods and their sampling capabilities may be pushed to their limit in order to measure small displacements arising from useful ultrasonic frequencies. 

Melody Png 

University: Imperial College London Supervisor: Dr Bo Lan 

EngD Project: Material Characterization using Ultrasonic Testing 

The aim of this project is to explore novel developments in the area of ultrasound to characterize critical microstructures of engineering materials, with a particular focus on diffuse ultrasound. The project comprises of: 1. Developing theoretical and computational models to understand the behaviour of diffuse ultrasound to microstructures 2. Conducting experimental validations as well as defining potential applications of this technique. Specifically, this project focuses on Ti-64 alloys in development of a generic solution that could also be applicable to other materials. 

Adam Gilmour

University: Strathclyde Supervisor: Dr Gordon Dobie Sponsor: BAE Systems Submarines 

EngD Project: Robotic Inspection of Complex Welds 

Current semi-automated NDT practices often require a great deal of human interaction or interference. This project aims to develop robotic solutions for industrial applications by reducing the amount of hands-on inspection time and through improving the capabilities of automated procedures. We also aim to develop more intelligent inspection systems by incorporating in-situ NDE data into the decision making of any robotic application.

Matt Chandler

University: Bristol Supervisor: Professor Anthony Croxford 

PhD Project: Ultrasonic Inspection for Complex Geometry 

Current ultrasonic inspection methods typically rely on line-of-sight access to the region being inspected within a material. In general, this means that geometrically complex components are challenging to inspect in-situ. This project aims to explore how regions of material without line-of-sight access can be inspected by exploiting the reflections of ultrasonic waves from the component geometry, starting with simple geometries before moving on to complex cases. This would enable a wider range of components to be inspected in service, reducing downtime. 

Qin Feng

University: Bristol Supervisor: Professor Bruce Drinkwater Sponsor: China Scholarship Council 

PhD Project: Novel ultrasonic coupling materials 

In ultrasonic non-destructive testing (NDT) the use of a coupling liquid or solid between an emitter and the test structure is universal. These layers allow the energy to be transmitted into the structure as well as allowing reflected energy to be received. This project aims to build on recent advances in materials and 3D printing to develop novel coupling layers. 

Luke Smith

University: Warwick Supervisor: Professor Steve Dixon 

PhD Project: Ultrasonic Flow Measurement 

Thin-walled pipes are widely used for carrying fluids in domestic and industrial environments, but clamp-on ultrasonic flow measurement is difficult because the pipes host guided waves. The aim of this project is to understand the behaviour of leaky guided waves in the pipe-fluid system to enable reliable flow measurement.  The received signals are complex, so the first task is to identify the paths by which the ultrasound can reach the detector through experiments and computing. Then, a meter can be developed which utilises this knowledge to make a transit time flow measurement. 

Joshua Aigbotsua

University: Bristol Supervisors: Professor Bruce Drinkwater & Professor Mahdi Azarpeyvand Sponsor: Baugh and Weedon 

EngD Project: Low-frequency Vibration Inspection of Sandwich Composites 

One-sided in-service inspection of certain composite structures (honeycomb-, balsa- and foam-core sandwich) can be successful using a low-frequency vibration method but defect detection is limited, and classification of defects is not currently supported. This project aims to establish a new low frequency inspection method, termed ‘Thickness Resonance’, which has the ability to resolve far-side defects in certain sandwich composite structures. Defects classification, including determining their depth, location and size will be achieved based on comparison with modelled low-frequency responses of a range of structures with different defect types. 

Meirbek Mussatayev 

University: Bristol Supervisor: Dr Robert Hughes & Professor Paul Wilcox 

PhD Project: In-line Eddy-Current Characterisation of Carbon Fibre Composites 

This project will explore how the material and environmental properties influence the detectability of flaws and structural properties. 

The aim and objectives of this project are:   

  1. Determine how layup structure alters the effective conductivity of the structure. 
  2. Characterise differences in ECT response to cured and uncured carbon fibre composite materials.   
  3. Develop advanced measurement & data-analysis techniques for evaluating structural properties such as fibre orientation, stacking sequence and fibre density variations.  

Specifically, this project focuses on evaluating of the influence of inspection environment as well as the improving the probe design. Specific requirements for the probe design:  

  • have a high sensitivity to detect small defects with a very good signal-to-noise ratio when handled with conventional ECT equipment.   
  • be capable of detecting distinct kinds of defects (morphology and locations).   
  • be easily customizable and affordable. 

Weixin Wang 

University: Bristol Supervisors: Dr Jie Zhang and Professor Paul Wilcox Sponsor: China Scholarship Council 

PhD Project: Metallic material grain structure characterisation using ultrasonic arrays 

A major barrier to characterise materials at the defect early development stage is the lack of techniques to measure material grain structure, mainly including grain size and its texture. This limits the further understanding of the ultrasonic wave interactions between material grains and defects and their ultrasonic signal and image performance. The aim of this project is to develop ultrasonic array techniques to enable the material grain structure to be measured before defect detection. The key is how to use ultrasonic phased arrays to capture data, control wave beamforming and postprocess the data to extract useful information such as material gain size and its texture. 

Serhat Bakir 

University: Bristol Supervisor: Professor Paul Wilcox PhD Project: Guided wave monitoring of girth-welded specimens using artifical intelligence 

Connor Challinor 

University: Imperial Supervisor: Professor Fred Cegla – Sponsor: NDT Global EngD Project: Coded Excitation of Ultrasound for Improved Signal Acquisition in Pipeline Inspection Robots 

David Harra 

University: Strathclyde Supervisor: Katy Tant PhD Project: Ultrasonic Characterisation of Micro-Texture Regions In Titanium Alloys 

Ewan Nicolson 

University: Strathclyde Supervisor: Charles MacLeod PhD Project: Advanced NDE in Future Oil and Gas Inspection 

Chris Stone 

University: Bristol Supervisors: Professor Anthony Croxford & Professor Bruce Drinkwater PhD Project: Acoustic Streaming – Developing a Fundamental Understanding of Acoustic Streaming and its Use for Flow Manipulation and Control 

Nina Sweeney

University: Strathclyde Supervisor: Dr Charles MacLeod

Sponsor: Peak NDT

EngD Project: In-Process Adaptive NDT for Fast & Flexible HVM

This project aims to improve the flexibility, accuracy and speed of in-process High Value Manufacturing (HVM) robotic inspection and control operations, with a focus on three key challenging applications: arc welding, wire and arc additive manufacturing (WAAM) and complex carbon fibre composites.

Nikolay Pilashev

University: Bristol Supervisor: Professor Paul Wilcox Sponsor: Rolls Royce

EngD Project: Automated Sentencing for Complex Shaped CFRP Components

Carbon fibre material is increasingly being considered for aero-engine components. Such components are being designed to withstand high loads and to have more complex shapes, making inspection for material integrity both more important and more difficult. New analysis techniques are required and are being developed for defects such as porosity. However, such techniques create large data sets that become time consuming and difficult, or impossible, to interpret by a human inspector.

The aims of the project will include: 1. Investigation of new quantitative data analysis techniques for porosity detection in CFRP. 2. Development of data fusion methods to allow extraction and presentation of information from multiple data sources. 3. Automated interpretation of 3D data.

Mikolaj Mroszczak

University: Imperial College London Supervisor: Dr Peter Huthwaite Sponsor: Guided Ultrasonics Limited (GUL)

EngD Project: Measurement Interpretation for Guided Wave Testing

The ongoing development of Guided Wave Testing of piplelines is increasingly generating large amounts of measurement data that needs to be interpreted. This includes change detection from repeat measurements acquired from permanently-installed transducer equipment, the automation of the interpretation of routine measurements, and the assessment of complex signals to extract image or critical parameter information. The pressure to develop software tools to aid these tasks is amplified by the increasing availability of the large quantities of raw data via cloud communications. This project will work on developing methodologies and implementing these in software tools to address these needs.

Yangjie Chen

University: Bristol Supervisor: Professor Anthony Croxford

PhD Project: Autonomous NDT

The aims of my project and to work closely with University spin out company ‘Inductosense‘, who developed innovative wireless, battery free, and permanently installed sensors for non-destructive testing. I will develop a robotic platform that ultimately aims to deploy sensors and take measurements autonomously with given locational information of where the sensors are permanently installed, which hugely increases the accessibility and reduces the cost of operation.  

To achieve the goal, accurate positioning and perfect alignment between the measurement probe and sensors are required. 

Zubeir Ebrahim Saib

University: Bristol Supervisors: Professor Bruce Drinkwater & Professor Anthony Croxford

PhD Project: Early detection and characterisation of defects using nonlinear ultrasound

One of the grand challenges in non-destructive testing (NDT) is the measurement of the remaining life of a structure.

Up to now, most NDT methods aims to detect and characterise relatively large defects which occur at the end of the life of a structure using linear ultrasound. Potential use of nonlinear ultrasound has been demonstrated in the literature to be sensitive to early formation of defects, such as microcracks. Different techniques exist, namely second harmonic generation and diffuse field. However, whilst these new nonlinear imaging or defect characterisation techniques have shown promising results in laboratory experiment, they have not yet reached the sensitivity to image the build-up of material nonlinearity due to aging, or other effects such as thermal or plastic deformation.

This project aims to develop the required modelling tool to fully understand the measurement scenario and devise experiments to extract material nonlinearity to predict failure at an earlier stage.

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