Novel Design of Magnetorheological Sandwich-Structures for Attenuation of Vibrations

Novel Design of Magnetorheological Sandwich-Structures for Attenuation of Vibrations
Engineering for the Information Society and Sustainable Development
Dra. María Jesús Elejabarrieta and Dr. Fernando Cortés Martínez
The candidate will do a Ph.D within the Applied Mechanics group of University of Deusto, Spain. The line of research will be Advanced Materials
Requirements: • Master’s degree in Industrial Engineering, Materials Engineering or Physics. • Proffesional English level. • Knowledge of numerical and empirical techniques. • Deep understanding of Electromagnetism. • Communication skills and ability to work in a team.
  • Information Sciences and Engineering (ENG)
  • Physics (PHY)
The reduction of the amplitude of structural vibrations is a challenge to improve several aspects of products, such as security, lifecycle, comfort or acoustic pollution. Amongst the methodologies that target control of structural vibration, passive techniques with viscoelastic materials are relatively easy to implement, and have a low cost. Within these methodologies, sandwich structures stand out. They are composed of metallic skins and a thin core. Because of these properties they are appropriate for applications with weight restrictions. However, when the source of the vibration is variable, these passive sandwich structures are not ideal to attenuate vibrations. Smart structures solve this issue. Magnetorheological materials are able to modify their rheological properties in response to external magnetic fields. Hence, they are ideal to manufacture smart sandwich-structures. The proposed Thesis targets: Designing magnetorheological sandwich-structures to achieve a maximum attenuation of vibrations in a high frequency band and under different working conditions. The challenge to be solved is the dynamic-electromagnetic interactions that appear as a product of an external magnetic field. Methodologies: Develop methods for experimental characterization of the magnetorheological and dynamic-electromagnetic interactions. Generate models to predict the behaviuor of the sandwich-structures. Implement numerical methods and control strategies.

EXCELLENCE OF THE HOST RESEARCH UNIT

L. Irazu and M.J. Elejabarrieta. Effect of magneto-elastic force on magneto-dynamic model of viscoelastic-magnetorheological sandwiches. Smart Materials and Structures; Vol. 28(7); 2019. ISSN 0964-1726. JCR (2018) 3.543 INSTRUMENTS & INSTRUMENTATION (9/61) Q1 L. Irazu and M.J. Elejabarrieta. Analysis and numerical modelling of eddy current damper for vibration problems. Journal of Sound and Vibration; Vol. 426; 75-89; 2018. ISSN 0022-460X. JCR 3.123 MECHANICS (21/134) Q1 L. Irazu and M.J. Elejabarrieta. A novel hybrid sandwich structure: viscoelastic and eddy current damping. Materials and Design. Vol. 140; 460-472; 2018. ISSN: 0264-1275. JCR 5.770 MATERIALS SCIENCE, MULTIDISCIPLINARY (50/293) Q1 Jon García Barruetabeña and Fernando Cortés Martínez. Finite elements analysis of the vibrational response of an adhesively bonded beam. Engineering Structures. 171. pp. 94. 2018. ISSN 0141-0296. JCR 3.084 ENGINEERING CIVIL (22/132) Q1 I. Agirre-Olabide, A. Lion, M.J. Elejabarrieta. A new three-dimensional magneto-viscoelastic model for isotropic magnetorheological elastomers. Smart Materials and Structures; Vol. 26, N 3, 2017. ISSN: 0964-1726. JCR 2.963 INSTRUMENTS & INSTRUMENTATION (9/61) Q1
AVISANI; Atenuación de vibraciones mediante sandwich inteligentes, con nucleoviscoelastico-magnetorreológico. Ministerio de Economía y Competitividad. Proyectos de I+D+I, Retos de las Sociedad (DPI2015-71198-R). De 2016 a 2018. IP: M.J. Elejabarrieta Olabarri SAVA; Sistemas de aislamiento vibratorio avanzados. Diputación Foral de Guipuzcoa. 13 Programa de la Red Guipuzcoana de Ciencia, Tecnología e Innovación. De 2017 a 2018. IP: M. J. Elejabarrieta Olabarri MAGNETOBUSH; Nueva generación de bushes inteligentes basados en elastómeros magnetorreológicos. Gobierno Vasco–Educación-Universidad Empresa.(UE2013-09). De 2013 a 2015. IP: M.J. Elejabarrieta Olabarri AVISUINT; Atenuacion de Vibraciones mediante Suspensiones Inteligentes: Fluidos y Elastómeros Magnetorreológicos. Ministerio de Economía y Competitividad. Investigación Fundamental (DPI2012-36366). De 2013 a 2015. IP: M.J. Elejabarrieta Olabarri MACOVI; Investigación sobre la aplicabilidad de materiales compuestos para vigas de encofrado horizontal. Gobierno Vasco–Educación-Universidad Empresa.( UE09+/04). 2010. IP: Fernando Cortés Martínez

INTERDISCIPLINARY COLLABORATION

The reasearch topic falls into structural-dynamics and electromagnetism. In its development, both, numerical and experimental methods will be combined.
The thesis will be co-directed by Dr. María Jesús Elejabarrieta Olabarri (who has supervised 6 doctoral thesis, two of which with international honors) and Dr. Fernando Cortés Martínez (who has supervised 3 doctoral thesis). They have co-authored 11 JCR publications.
The main research topic of this proposed thesis falls naturally within Advanced Materials (Applied Physics) and Industrial Engineering. Moreover, due to its many applications, this research can have a considerable impact in Transport, Manufacturing and Energy Efficiency. Furthermore, advanced analysis methods that are not field specific will be applied and extended whenever possible, allowing other sciences to profit from any advance in these experimental and numerical techniques.

INTERNATIONAL COLLABORATION

This thesis proposal is directed by Horizonte 2020 and by the Plan Estatal de Investigación Científica y Técnica y de Inovación 2017-2020. It falls within Reto para Transporte Sostenible, Inteligente, Conectado e Integrado, since it promotes technological innovation in the transport sector thanks to the development of an emerging technology, smart-sandwhiches, which is applicable to the manufacturing of efficient vehicles and the use of sustainable resources respectful with the climate. This technology has the potential to reduce the impact on the environment by replacing asphalt coating, which currently cover metallic pieces. Moreover, it will reduce acoustic contamination by improving comfort vibro-acoustic of the available transport systems.
We are considering this option since Dr. M.J. Elejabarrieta will undertake a research stay with the group of Prof. D. Inman, Adaptive Intelligent Multifunctional Structures Lab of the Aerospace Engineering Department in Michigan University in 2020. This stay will start a collaboration and merge two research topics, adaptive meta-structures and magnetorheological materials and it will be financed by the Ministry of Education and Science, within the Program Salvador de Madariaga 2019 (PRX19/00611) It should be noted that Prof. Daniel J. Inman has published over 370 articles in indexed journals. He is one of the leading researchers in structural-vibrations. Furthermore, we do not discard international collaborations with two additional groups of international prestige (we have collaborated previously with them): -The group of Prof. Lion of the University of Bundeswehr in Munchen (Germany). Agirre-Olabide, A. Lion, M.J. Elejabarrieta, A new three-dimensional agnetoviscoelastic model for isotropic magnetorheological elastomers. Smart Mater. Struct. Vol. 26, N 3; (2017). ISSN: 1361-66. -The group of Prof. Pavel Kuzhir of Laboratoire De Physique De la Matiere Condensee of Universite De Nice Sophia-Antipolis. Agirre-Olabide, P. Kuzhir, M.J. Elejabarrieta, Linear magneto-viscoelastic model based on magnetic permeability components for anisotropic magnetorheological elastomers. Journal of Magnetism and Magnetic Materials 446 (2018) 155–161. ISSN:0304-8853.

INTERSECTORAL COLLABORATION

We intend to request co-financing with the Spanish Program I+D+I Retos de la Sociedad (2019).
The proposed Thesis is not a Ph.D in Industrial Engineering.

IMPACT

The socio-economical impact of this research proposal is based on the potential of the magnetorheological technology, since during the last years, new industrial applications based on the use of smart materials are emerging. Therefore, technological transfer to enterprises is a strong possibility, specially in the transport sector and in the manufacturing of components. This will: -Improve the efficiency of transport due to their lighter weight than the current ones based on metal. -Reduce the environmental impact by replacing asphaltic , that currently cover metallic pieces and by reducing acoustic contamination

INNOVATION

Although the use of magnetorheological materials to isolate vibrations has been a research topic for the last three decades, many questions remain unanswered. This doctorate targets: – The atenuation of vibrations of the magnetorheological sandwich by the contribution and interaction of three physical phenomena (Foucault currents, magnetorheological effect and magnetoelastic force) that manifest when an structure vibrates upon the application of a magnetic field. – The design of both, the magnetorheological sandwich and the magnetic field to be applied in order to magnify the desired the physical phenomena in order to satisfy the required working conditions. – The generation of a physical model of the magnetorheological sandwich according to the magnetic field, the frequency and the temperature, based on the constituitive models of the skins and the core. This way, the vibrations attenuation of the smater sandwich can be modelled and controlled based on the dynamic-eletromagnetic coupling

INCLUSION

Although this proposal is focused on Advanced Materials, if succesful, it will have positive implications on the environment and the prosperity of society.