Following on from the first year module "Mechanical Properties" this module provides further detail about the deformation characteristics of a wide range of engineering materials. The processes involved in elastic deformation, plastic deformation, fatigue and creep are examined and applied to different classes of materials including metals, ceramics and composites.
The course aims to provide a basic understanding of propulsion systems in order to contribute to graduating students obtaining a holistic understanding of the aerospace sector. The course includes:- - Propulsion unit requirements for subsonic and supersonic flight - Piston engine components and operation - Propeller theory - Gas turbine engines: operation, components and cycle analysis - Thermodynamics of high speed gas flow - Efficiency of components - Rocket motors: operation, components and design - Dynamics of rocket flight - Environmental issues
Following on from the "Mechanical Properties" module this course provides further detail about the deformation characteristics of a wide range of engineering materials. The processes involved in elastic deformation, plastic deformation, fatigue and creep are examined and applied to different classes of materials including metals, ceramics and composites. Specific examples related to the medical industry are provided.
Each candidate will prepare a detailed project plan covering background to the research, the scheduling of practical and other work, and milestone deliverables. This plan will be produced following: (i) attendance at specialist lectures covering issues of good practice in the conduct of research eg safety, procedures for laboratory work and data reporting/analysis; (ii) discussion with academic and industrial supervisors regarding technical/commercial issues associated with the specific topic; (iii) a review of the formal course units covering technical issues, personal and professional development and research skills. The overall report must demonstrate that each student relates relevant aspects of the training courses to their industry oriented research project. Not available to visiting or exchange students.
The module defines low and high temperature creep in metallic and ceramic based materials. Deformation mechanisms and bulk measurements are described as a basis for predictions of mechanical component behaviour.
This module, a combination of interactive seminars and computer based exercises, will provide engineering students with a detailed appreciation of financial investment for the technical environment. It will highlight the role of the individual and management during financial decision making procedures and associated risk assessment. Case studies of large scale investments in the aerospace industry will be employed throughout the course.
The module aims to give a complete understanding of the main aspects of gas turbine design. It is “holistic” in its emphasis on the links between performance aerodynamics, mechanics and the associated materials selection. These design criteria will be applied to the case study of a simple turbofan or intercooled/recuperated marine/industrial engine, using only hand calculations on paper (i.e. without the aid of a computer) and working in small teams.
|Start Date||End Date||Position Held||Location|
|2012||Present||Senior Lecturer||Materials Research Centre, Swansea University|
|2007||Present||RCUK Fellow||Materials Research Centre, Swansea University|
|2003||2007||Research Officer||Materials Research Centre, Swansea University|
|2004||“Texture, microstructure and mechanical properties in Ti6-4”, Ti 2003 Science & Technology 3, pp 1759-1766|
|2006||“Prediction of LCF initiation lives in DEN specimens based on strain control testing of plain Ti6246 specimens”|
|2006||“Prediction of notched specimen behaviour in textured Ti-6Al-4V”, 9th International Fatigue Congress, Atlanta|
|2007||“Torsion fatigue in near alpha and alpha titanium alloys”, 11th International titanium conference, Kyoto|
|2007||“Effect of prestrain on ambient and high temperature creep in Ti834”, 11th International titanium conference, Kyoto|
|2008||“Characterisation of stress concentration features in the + titanium alloys” 11th Portuguese conference on fracture|
|2009||“Time Dependent Fracture of Titanium Alloys” 12th International Conference on Fracture, Ottawa, Ontario, Canada|
|2009||“Fracture mechanisms due to Fatigue, Creep and Environmental damage in titanium alloys” 12th International Conf. on Fracture|
|2009||“Creep fracture of centrifugally-cast HK40 tube steel”, ECCC creep conference, Zurich|
|2011||“Fatigue life variation due to microstructure in Ti6-4” 12th World conference on Titanium, Beijing|
|2012||“The Wilshire Equations for Long-Term Creep Life Prediction”, Creep 2012|
|2012||“High Temperature Creep Behaviour of Gamma Titanium Aluminides (-TiAl)” Creep 2012|
2011 - Present
2012 - Present
|2007||Awarded Chartered Physicist Status|
|2007||Awarded RCUK Research Fellowship|
Within the gas turbine engine, the high transient thermal stresses resulting from throttle movement from idle to high settings give rise to the phenomenon of thermo-mechanical fatigue (TMF). These effects have been widely explored for turbine blade materials, typically single crystal nickel alloys. More recently however, a combination of thinner disc rims and further increases in turbine entry temperature has lead to a situation where TMF in disc materials cannot be ignored. Turbine discs will usually be manufactured from polycrystalline nickel alloys, and as such it is now considered critical that TMF effects in this system of alloys is fully characterised. Research within the Institute of Structural Materials in collaboration with Roll-Royce plc leads the way in the development of modelling approaches to TMF through a range of cutting edge experimental techniques.
Modern creep lifing approaches
Traditional creep lifing techniques based on power law equations have shown themselves to be extremely limited, particularly in the prediction of long term data based only on short term experimental data. More recently, alternative approaches such as the Wilshire equations and hyperbolic tangent methods have been proposed which offer a new insight into the field. Ongoing research within the Institute of Structural Materials focuses on the development of the Wilshire equations in particular, their relationship with microscopic behaviour of engineering alloys and their application to a range of materials that currently includes copper, aluminium alloys, steels, titanium alloys, nickel superalloys and titanium aluminides.
Premature failure of titanium based engineering components in the 1970s brought to attention the phenomenon of dwell effects at low temperatures in these alloys, loosely termed ‘cold creep’, which are currently still a major concern for designers. Ongoing research at the Institute of Structural Materials seeks to address the issue through targeted mechanical testing and microscopic evaluation. The presence, extent and effect on mechanical properties of cold dwell related features such as ‘quasi-cleavage’ facets are investigated with the resultant effect on both creep and fatigue life also studied.
Measures of Esteem