Modal responses of mechanical structures under thermo-mechanical loads PhD

The research in this doctoral opportunity will investigate the relation between the strain energy and the change in modal response of a structure under thermo-mechanical loads.

Sub-surface fatigue in mechanical structures affecting their fundamental modes within conventional sensing limits. As per published research, these effects are mostly investigated under dynamic loads on different boundary conditions. Analytical, numerical and empirical studies clearly indicate that the dissipated strain energy during crack propagation affects the modal values of the structure. However, there is still need to perform comprehensive research that can relate the mentioned parameters specifically under thermo-mechanical loads. The cyclic thermal loads along with dynamic loading may represent a more practical loading scheme as experienced on mechanical components or structures.

In this research, empirical setup will be developed by using a modal exciter and a mini cartridge or induction heating mechanism to provide both the dynamic and thermal loading on a mechanical structure simultaneously. Instrumentation involving accelerometers, acoustic sensors and data acquisition will allow the measurement of the modal response together with the dissipated strain energy. Empirical testing schemes will be pursued under a pre-set boundary condition and more likely to be in a free-fixed mode. The data acquired will be used to relate the strain energy and modal response of the structure when subjected to sub-surface fatigue.

About Cranfield

Cranfield is an exclusively postgraduate university that is a global leader for transformational research and education in technology and management. Research Excellence Framework 2014 (REF) has recognised 81% of Cranfield’s research as world leading or internationally excellent in its quality. Every year Cranfield graduates the highest number of postgraduates in engineering and technology in the UK (Source: Higher Education Statistics Agency Ltd). Cranfield Manufacturing is one of eight major themes at Cranfield University. The manufacturing capability is world leading and combines a multi-disciplinary approach that integrates design, technology and management expertise. We link fundamental materials research with manufacturing to develop novel technologies and improve the science base of manufacturing research.

The Through-life Engineering Services (TES) Centre are among the world leaders in through-life approaches for high value systems, Condition monitoring, Damage tolerance, Asset management. TES was developed with the support of EPSRC grant of £ 11 million with the aim to develop research excellence and address the research problems in the sector of Through-life Engineering services. TES Centre is providing its state of the art academic and research services to industrial clients such as Boeing, BAE Systems, Rolls-Royce, Meggitt, Thales, MOD, Bombardier, QinetiQ, Thales, Network Rail, Schlumberger and Alstom.

At a glance

Application deadlineOngoing
Award type(s)PhD
Duration of award3 years
EligibilityUK, EU, Rest of world
Reference numberSATM470 & SATM471

Supervisor

Dr Muhammad Khan and Professor Andrew Starr

Entry requirements

A minimum of a 2:1 first degree in a relevant discipline/subject area (e.g. aerospace, automotive, mechanical, and manufacturing) with a minimum 60% mark in the Project element or equivalent with a minimum 60% overall module average
The potential to engage in innovative research and to complete the PhD within a three-year period of study
A minimum of English language proficiency (IELTS overall minimum score of 6.5).

Also, the successful candidate is expected to:

Have excellent analytical, reporting and communication skills
Be self-motivated, independent and team player
Be genuine enthusiasm for the subject and technology
Have the willing to publish research findings in international journal.

Funding

Self-funded

Cranfield Doctoral Network

Research students at Cranfield benefit from being part of a dynamic, focused and professional study environment and all become valued members of the Cranfield Doctoral Network. This network brings together both research students and staff, providing a platform for our researchers to share ideas and collaborate in a multi-disciplinary environment. It aims to encourage an effective and vibrant research culture, founded upon the diversity of activities and knowledge. A tailored programme of seminars and events, alongside our Doctoral Researchers Core Development programme (transferable skills training), provide those studying a research degree with a wealth of social and networking opportunities.