5^th World Congress on Smart and Emerging Materials April 19-20, 2018 Dubai, UAE

Biography:

M Moatamedi is currently the Chair of Multi-physics at UiT-The Arctic University of Norway where he is the Director of Multi-physics Centre. He has completed his MSc and PhD at The University of Sheffield, MBA at Manchester Business School and LLM International Business Law at The University of Leeds. He has an extensive experience in modeling and simulation particularly in multi-physics approach to industrial investigation. He has held Senior Managerial and Research positions in many institutes including Cranfield University, Imperial College London and the University of Manchester. He is a Fellow of the Royal Aeronautical Society and the Nuclear Institute and a Member of ASME. He is the Vice Chairman of the Association of Aerospace Universities and a Member of the Council and the Board of Directors of NAFEMS. He is the Founding President of The International Society of Multi-physics

Abstract:

Multi-physics simulation is a relatively new class of analysis in the field of engineering and science. Previously numerical modeling involved both fluid and structure which was undertaken using two separate codes, a Computational Fluid Dynamics (CFD) code for the fluid analysis and a Finite Element Analysis (FEA) code for the structural response. Recent advances in technology now enable the modeling of both fluid and structure within single code enabling a fully coupled analysis to be performed. This talk concentrates upon a number of applications concerned with the multi-physics modeling in real industrial problems involving new material challenges. These problems include a series of experimental data and simulations such as Concorde accident investigation, airbag certification, nuclear incident and other complex investigations. Experimental verification and validation of the numerical codes is essential in such practical applications to reduce the cost and enhance safety in design and manufacturing. The comparison between experiment and numerical analysis will be discussed in the above-mentioned applications.

Biography:

Elias Siores is the Provost and Director of Research and Innovation, Bolton University. Educated in the UK (BSc, MSC, MBA, PhD) and pursued his academic career in Australia (Sydney, Brisbane and Melbourne) and Asia (Hong Kong, Dong Guan) before returning to Europe (UK) as a Marie Curie Fellow. His R&D work concentrated on advancing the science and technology in the field of automated Non-Destructive Testing and Evaluation including Ultrasound, Acoustic Emission, and Microwave Thermography. His recent R&D work focuses on Smart / Functional Materials and Systems development. In this area, he has developed Electromagnetic, Electrorheological, Photovoltaic and Piezoelectric Smart Materials based Energy Conversion Systems for Renewable Energy, Medical, Health Care and Wearable Devices.  He has published over 300 publications including 8 Patents . He has been a member of editorial boards of international journals and a Fellow of IOM, TWI, IEAust, SAE and WTIA. He has served on Board of Directors of a number of research centres worldwide including UK, Australia, Singapore and Hong Kong, all associated with the Bio-Nano-Materials field. He has received 15 awards in his career for R&D achievements

Abstract:

For energy harvesting from human movement, fibre based electrical power generators are highly desirable as they are light weight and comfortable and look no different from the conventional fabrics. The conjunction of piezoelectric materials in fibres and therefore fabrics offers a simple route for the building of soft piezoelectric generators. The flexible textile structures can themselves be designed so as to provide piezoelectric output on low levels of strains and loadings while providing high fatigue resistance under a large number of variable mechanical deformation and loading cycles. In this work, we demonstrate “3D spacer” technology based all-fibre piezoelectric fabrics as power generators and energy harvesters (Figure 1(a)). The single step knitted structure consisting of high β-phase (~80%) piezoelectric PVDF produced using conventional melt spinning under high electric field (0.6 MV/m) are knitted together with Ag coated PA66 yarns acting as the top and bottom electrodes. The novel and unique textile structure provides an output power density in the range of 1.10-5.10 μWcm^-2 at applied impact pressures in the range of 0.02-0.10 MPa, providing significantly higher power outputs and efficiencies over the existing 2D woven and nonwoven piezoelectric structures (Figure 1(b)). The all fibre piezoelectric fabric possesses the advantage of efficient charge collection due to intimate contact of electrodes and uniform distribution of pressure on the fabric surface, leading to enhanced performance. Furthermore, an substantial increase in piezoelectric output of the PVDF yarns has been achieved using ZnSnO₃ based perovskite which has doubled the piezoelectric constant from 60 pm/V to nearly 130 pm/V. Bearing all these merits in mind, we believe our method of producing large quantities of high quality piezoelectric yarn and piezoelectric fabric provides an effective option for the development of high performance energy-harvesting textile structures for electronic devices that could be charged from ambient environment or by human movement. Furthermore, via the creation of hybrid photovoltaic films and fibres, energy can be captured from solar radiation and used where the mechanical impetus is absent. The high energy efficiency, mechanical durability and comfort of the soft, flexible and all-fibre based power generator is highly attractive for a variety of potential applications such as wearable electronic systems and energy harvesters charged from ambient environment or by human movement.

Keywords:  Poly(vinylidene fluoride) PVDF, energy harvesting, piezoelectric effect, 3D spacer, textiles

Figure 1: Figure illustrating (a) change of α to β phase using UoB patented process, (b) structure of 3D spacer piezoelectric fabric, (c) measured power output of the 2D and 3D piezoelectric fabrics as a function of the impact pressure.

References:

1. Soin, N., Shah, T. H., Anand, S. C., Geng, J., Siores, E. et al (2014) Novel 3D-spacer all fibre piezoelectric textiles for energy harvesting applications, Energy Environ. Sci, 7(5), 1670-1679
2. Soin, N., Shah, T. H., Anand, S. C., Siores, E., (2013) 3D spacer piezoelectric fabrics and production of thereof, UK Patent application no. 1313911.8
3. Siores, E., Hadimani, R. L., Vatansever (2012) Piezoelectric polymer element and production method and apparatus thereof, WO Patent WO/2012/035350

Biography:

Manoj Gupta was the Former Head of Materials Division of the Mechanical Engineering Department and Director designate of Materials Science and Engineering Initiative at NUS, Singapore. He did his PhD from University of California, Irvine, USA (1992) and Postdoctoral Research at University of Alberta, Canada (1992). In August 2017 he was highlighted among Top 1% Scientist of the World Position by The Universal Scientific Education and Research Network. He has published over 455 peer reviewed journal papers and owns two US patents. He has also co-authored six books, published by John Wiley, Springer and MRF, USA

Abstract: