Invited speakers

  • Title to be confirmed
    Professor Janice Barton, University of Southampton, UK

  • Vibration energy harvesting: fundamentals and applications
    Professor Steve Beeby, University of Southampton, UK
   
  Vibration energy harvesting (VEH) involves the conversion of kinetic energy, in the form of vibrations, into electrical energy for use in powering autonomous sensor systems. It is an applied technology and the the design of the harvesters is fundamentally linked to the frequency spectrum and amplitude of the vibrations. The application also imposes physical constraints (space limitations and form factor), reliability requirements and, for commercial solutions, cost constraints on the entire system (harvester, power conditioning electronics, energy storage and load electronics). This talk will provide a brief overview of the fundamental principles of VEH and illustrate these through example harvesters and systems developed at the University of Southampton and at Perpetuum Ltd. These examples will include fixed frequency electromagnetic harvesters for industrial applications, piezoelectric harvesters designed for use in helicopter health and usage monitoring systems (HUMS) and a wireless condition monitoring system for the rail industry powered by Perpetuum’s vibration energy harvester. Finally, the suitability of different types of energy harvester (linear, bistable and Duffing type non-linear) for use in real applications will also be explored. 

 

  • Dynamic adaptive recursive concurrent multi-scale modelling in impact mechanics
    Professor Nik Petrinic, University of Oxford, UK
   
   The design against rapidly applied mechanical load upon engineering structures arising from short-lasting events such as explosions or collisions represents often one of the most critical aspects of all new engineering projects.  All final designs are currently assessed using elaborate numerical simulations, but their ability to meet the design requirements, in which both the global structural response and detailed stress analysis that respects all material characteristics and manufacturing processes are addressed, still remains a challenge due to massive computational requirements even for geometrically very small products.  The research into concurrent multi scale modelling which is capable of simulating the response of the structure at large (global) level simultaneously with accurately representing the behaviour of materials (ingredients) at the smallest relevant (local) level is the new backbone of the adopted integrated experimental-modelling approach presented in this paper.  In particular, initial results of stress wave propagation phenomena are presented, by focusing on the impulsive excitation and emphasizing the issues related to the communication between the length scales during the concurrent simulations, in order to demonstrate the ability of the algorithms to maintain the energy balance throughout the calculations. A new three-dimensional multi-scale adaptive method for explicit formulation is introduced, that allows a computationally efficient simulation of dynamic problems.  The introduction of the different spatial and temporal scales only on as/where needed basis, removes the limitation of those approaches which rely upon a-priori knowledge of the “hot-spots”, hence simulating de-facto the whole domain at the lowest scale of interest. The results of simulations show that considerably larger problems could be solved more efficiently by the developed dynamic adaptive recursive concurrent multi scale modelling approach, while guaranteeing that both the global and local responses are at least as accurate as “brute-force” approach would show, if such computing power was available.
  • Towards a population-based approach to structural health monitoring
    Keith Worden, University of Sheffield, UK


Speaker Biographies

 

Professor Keith Worden began academic life as a theoretical physicist, with a degree from York University and a PhD in Mechanical Engineering from Heriot-Watt University eventually followed.

A period of research at Manchester University led to an appointment at the University of Sheffield in 1995, where he has happily remained since.

Keith's research is concerned with applications of advanced signal processing and machine learning methods to structural dynamics. The primary applications are currently in the aerospace and renewable energy industries.

     
  Professor Nik Petrinic graduated in Structural Mechanics in 1988 at the University of Zagreb.  He completed his PhD in Computational Mechanics at the University of Swansea in 1996 and became a lecturer at the University of Oxford in 1998.

Professor Petrinic lectures on topics in Engineering Materials, Solid Mechanics and Structures. His research activities are focused on the development and integration of experimental and numerical methods for predictive engineering design in Impact Engineering.  His particular interests include temperature and strain rate dependent constitutive material behaviour including strain localisation, damage and fracture, as well as contact interaction for multi-body systems.  He has 25 years of research experience in the field of dynamic behaviour of solid materials, systems and structures as principal investigator/collaborator on an intricate portfolio of projects funded by UK, EU and US government research and defence agencies as well as directly by industry world-wide, during which time he has been advisor to over 30 post-doctoral research assistants/associates and over 35 post-graduate students (exclusive of those visiting from other academic, research and industrial establishments world-wide).

Professor Petrinic heads Oxford’s Impact Engineering Team which operates within the Impact Engineering Laboratory where corresponding research and technology-transfer projects funded by government agencies and industry are hosted.  He is the Deputy Director of the oldest Rolls-Royce’s University Technology Centre in Solid Mechanics and the newly awarded Royal Academy of Engineering Research Chair in Impact Engineering.

Key dates

  • Abstract submission deadline [extended]:
    1 March
  • Early registration deadline:
    5 June 2018
  • Registration deadline:
    26 June 2018

More information

Authors of submitted abstracts will have the option to publish their papers in IOP Publishing’s Journal of Physics: Conference Series and also in the special edition Advances in Computational Stress and Vibration Analysis, of the European Journal of Computational Mechanics (EJCM).