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.
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.
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.
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.
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.
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.
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.
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:
- Determine how layup structure alters the effective conductivity of the structure.
- Characterise differences in ECT response to cured and uncured carbon fibre composite materials.
- 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.
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.
University: Imperial Supervisor: Professor Fred Cegla – Sponsor: NDT Global EngD Project: Coded Excitation of Ultrasound for Improved Signal Acquisition in Pipeline Inspection Robots
University: Strathclyde Supervisor: Katy Tant PhD Project: Ultrasonic Characterisation of Micro-Texture Regions In Titanium Alloys
University: Strathclyde Supervisor: Charles MacLeod PhD Project: Advanced NDE in Future Oil and Gas Inspection
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