Prof James Busfield
MA, PhD, FHEA, FIMMM, CEng
On this page:
- Current Funded Research Projects
- Current PhD Studentship Projects
- Previous Funded Research Projects
- Previous PhD Studentship Projects
- Other Research Projects
Current Funded Research Projects
Start: 01-04-2020 / End: 31-03-2023
This grant will cofund the establishing of a mini-CDT with 5 PhD studentships in Graphene materials at QMUL.
Start: 01-10-2018 / End: 31-03-2023
The Business of Fashion, Textiles and Technology (BFTT) is a five-year industry-led project, which focusses on delivering sustainable innovation within the entire fashion and textile supply chain. The aim is to foster a new, creative business culture in which fashion, textiles and technology businesses can use R&D as a mechanism for growth.
Start: 01-10-2019 / End: 30-09-2020
Carbon black filled elastomers composites are widely used in engineering applications. Their performance changes with time both from changes in their operating temperature and as a consequence of various different ageing mechanisms. This project focuses on modelling the effects of physical ageing on the mechanical properties.
Current PhD Studentship Projects
Start: 01-08-2019 / End: 31-01-2023
Off-road car tyres are used on harsh surface conditions and experience high stresses making them susceptible to failure mechanisms such as cut and chip. This project will improve the life span on treads used on off road tires by coupling materials innovations and materials characterization of different carbon black grades.
Start: 01-05-2019 / End: 31-10-2022
Start: 22-09-2017 / End: 21-03-2021
Packers are used to isolate production zones in oilfield completions. These elastomeric sealing elements undergo large deformations during setting and must survive down hole at pressures above 70MPa and temperatures above 230°C. This project will reduce design lead-times by developing constitutive models and methods to predict fluid leakage in these seals.
Start: 22-09-2017 / End: 21-03-2021
This PhD project aims to improve the design approaches used in Schlumberger to model the behaviour of elastomers for subsea sealing applications. It will initially focus on modelling friction interactions and then consider the material behaviour.
Start: 01-10-2015 / End: 30-09-2020
Dynamic seals such as those used in O&G drilling applications feature high strains, high strain rates, wide temperature ranges, contact with water and organic solvent mixes at large pressures. This project was to build a model to understand the behaviour of the elastomer materials found in mud motor stators.
Previous Funded Research Projects
Start: 01-10-2018 / End: 30-09-2019
This grant supports the work of the soft matter group in investigating the nature of the polymer filler interactions that are present in tyre compounds.
Start: 24-09-2018 / End: 23-03-2019
This grant is used to employ a PDRA, Dr Richard Windslow, to apply the knowledge he gained during his PhD program focused on Dynamic Seals and apply this towards a RCD Sealing Element. It will extend the modelling capabilities at Schlumberger and address challenges encountered to date for Sealing Element modelling.
Start: 01-10-2015 / End: 30-09-2018
This grant supported the work of the soft matter group in investigating changes to the nature of the polymer filler interactions in rubber compounds under strain.
Start: 01-06-2015 / End: 31-05-2017
This project funded a PDRA to examine the effects of sour gas ageing on crosslinked HNBR polymer. It focused on the changes to the network structure and their relationship to changes in their physical properties.
Start: 01-06-2013 / End: 31-05-2016
Hyundai enhanced their elastomer modelling capabilities and investigated the mechanisms that result in changes in behaviour with ageing of hydraulic elastomer mounting systems
Start: 01-05-2015 / End: 28-02-2016
This project funded a PDRA to examine the transitions from particulate wear behaviour to sticky wear behaviour in a range of novel tyre tread compounds.
Start: 01-10-2014 / End: 30-09-2015
This grant supported the work of the soft matter group in investigating the nature of the polymer filler interactions using dielectric spectroscopy.
Start: 01-12-2014 / End: 30-04-2015
This project funded a PDRA, Dr Lewis Tunicliffe, to examine the viscoelastic behaviour of HNBR elastomer compounds used in dynamic sealing applications in the oil and gas sector. The aim being to create a dataset of properties to accurately model the materials behaviour for use in finite element modelling.
Start: 01-06-2013 / End: 31-05-2014
A typical automotive engine is supported by three separate mounting systems. This project examined the interaction of various different mechanical, thermal and chemical degradation mechanisms on the behaviour of a hydraulic engine mount.
Start: 01-06-2013 / End: 31-05-2014
This programme aims to use both atomistic and course grained molecular dynamics to model the behaviour of rubber materials under strain. The aim being to use the models to develop better constitutive models to create more robust and realistic continuum mechanics models.
Previous PhD Studentship Projects
Start: 01-09-2014 / End: 31-12-2018
The project derived constitutive models that were valid over the entire service load and strain rate range for elastomer materials that are commonly used in vehicle suspensions.
Start: 01-01-2015 / End: 31-12-2018
This PhD studentship was part of the MICACT Marie Sklodowska-Curie Action Innovative Training Networks (ITN). Our contribution was to create a range of different Dielectric Elastomer Actuator devices for optical, haptic and bio-engineering applications.
Start: 22-09-2015 / End: 21-09-2018
This project studied the fracture behviour in complex seals used in the Oil and Gas industry. The approach used finite element techniques to evaluate the tearing energy for specific cracks located anywhere in the component and required detailed characterisation of the material tear and fatigue behaviour.
Start: 01-10-2014 / End: 30-09-2017
Glass fibres are typically used as a reinforcement in most elastomer timing belts. Unidirectional carbon fibre is an alternative reinforcement material. This project examines the interaction between both types of cord reinforcements and the HNBR as well as the fatigue behavior of the composite structures.
Start: 01-10-2013 / End: 31-03-2017
This EPSRC Case award examined how surface roughness effected the sliding friction for a wide range of different elastomer and rigid surface interactions.
Start: 01-10-2012 / End: 30-09-2016
Dielectric elastomers actuators are being developed to achieve large strains, requiring high electric fields approaching the dielectric breakdown strength of the material. The mechanisms that lead to breakdown in these materials was investigated.
Start: 01-10-2012 / End: 30-09-2016
This project developed new materials and applications for dielectric polymer composite structures which are “smart” materials. The development of new materials with an increased response to an applied voltage will allow new applications to be developed.
Start: 01-11-2013 / End: 30-04-2016
Abrasion tests were coupled to finite element fracture mechanics. The project demonstrated that the rate of abrasion under a wide range of friction conditions could be predicted from measurements made on independent fatigue test pieces.
Start: 01-10-2010 / End: 31-03-2014
This project is examined how the visco-elastic properties of different filled elastomer materials were affected by compounding and test temperature. The aim was to deduce the fundamental reinforcing mechanisms of filled elastomer materials.
Start: 22-03-2010 / End: 21-03-2013
This project extended fatigue crack growth evaluated using simple test pieces to predicting the fatigue failure of real components. Finite element techniques were applied to calculate the tearing energy relationships with an emphasis on inter layer fatigue peeling failure in aircraft tyres.
Other Research Projects
This work investigates how changes in the DC electrical properties (resistivity) change with strain for elastomers filled with conducting fillers such as carbon black. Broadband dielectric spectroscopy is used to measure the behaviour to see if more robust sensor type materials can be developed.
The dramatic increase in electrical resistance with temperature (pyro-resistive or PTC effect) is in development in self regulating heating devices. Various projects in collaboration with LMK Thermosafe have developed next generation compounds that outperformed previous commercial materials.
Prosthetic heart valves must be both durable and bio-compatible. The Structured Materials group at Cambridge University has developed an injection moulded polymeric heart valve whose fatigue performance is being evaluated. Prototypes must exceed a billion cycles in accelerated fatigue tests, to ensure a reliable lifetime prediction in service.
This work investigates the potential of dielectric elastomer actuators for tuneable haptic and optical systems. Our efforts have focused on the development of tactile displays, tuneable windows and tuneable optical lenses, as highly innovative devices for biomedical and bioinspired mechatronic systems.
The project examines how friction behaviour depends upon elastomer compounding, surface roughness, sliding speed, temperature and surface preparation. The project uses a range of finite element analysis modelling techniques to observe how phemomenon such as Schallamach waves are formed during sliding.
A hollow filler material can be used to create a closed cell foam structure. The full behaviour of this type of foamed elastomer is not well understood. The behaviour is observed in transparent elastomer materials using microscopy techniques to observe the process of bending, buckling and any dewetting at the rubber filler interface.
Materials such as carbon black, clays and silica significantly improve the mechanical properties measured in terms of strength and fatigue resistance when compounded into elastomers. This work uses different models over a wide range of length scales to understand polymer filler interactions at the atomic scale to micro-structural finite element models at the nanoscale.
The structure of a colloidal dispersion depends sensitively on the amount of shear used during processing, on the shearing time, on the particle size, on the particle structure, and on the surface chemistry of the particles. In this project, we will explore these parameters numerically, with the specific goal of understanding filler dispersion in rubber composites.