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Modelling of Porous Piezoelectric Material and Potential Applications to Vibration Energy Harvesting / German Martinez Ayuso

Swansea University Author: German Martinez Ayuso

DOI (Published version): 10.23889/Suthesis.52456

Abstract

Recently, the search of new materials with improved performance, such as higher strength, lower weight, fire resistance, less sensitive to fatigue,... has been fostered and driven by industries such as aerospace, energy, and nuclear. The development of composite materials has been an important step...

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Published: Swansea 2018
Institution: Swansea University
Degree level: Doctoral
Degree name: Ph.D
URI: https://cronfa.swan.ac.uk/Record/cronfa52456
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The development of composite materials has been an important step to achieve these goals since it allows the combination of di&#x2D9;erent materials in order to improve the overall performance of the resulting composite. Composites, such as layered woven composites or mixtures, are already heavy used in industry. These composite materials are tailored to improve one or several specific properties, for example higher strength or lower weight. However, composite materials are able not only to improve the existing material properties but also to add new properties. Self-sensing capabilities have drawn significant attention recently due to the increasing requirements of safety and optimization. Self-sensing structures are able to provide information in real time about its current state. Often self-sensing systems are distributed in large structures which poses a problem for the energy supply. Piezoelectric materials have been studied in depth for energy harvesting due to its capability to convert strain to charge and charge to strain. This is known as the piezoelectric e&#x2D9;ect and is used in many applications, from powering small devices to acoustic sensors. The use of these materials to harvest energy from the surrounding vibrations in the environment has been extensively studied by the scientific community, although commercial devices are still scarce.In this context, porous piezoelectric materials are a good option which can fulfil some of the above mentioned requirements: low density, strain-sensing capabilities and energy harvesting properties. Porous piezoelectric materials are composed of a piezoelectric material matrix with embedded air pores, which make them very light (up to 50% in some cases) while maintaining their piezoelectric properties. The presence of air reduces its material coe&#xFF;cients, such as sti&#x2D9;ness, piezoelectric coupling and dielectric values, which opens the possibility to tailor the material properties by controlling the percentage of air inside the matrix. The reduction of capacitance is seen as beneficial for energy harvesting, since it reduces the wasted energy in the self-induced electric field. Therefore, the porous piezoelectric material are studied for energy harvesting applications. However, given the lack of reliable material models for these type of composite, it is seems the necessity to develop material models which can predict accurately the properties of the piezoelectric composite. 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spelling 2022-12-18T10:04:10.1142207 v2 52456 2019-10-15 Modelling of Porous Piezoelectric Material and Potential Applications to Vibration Energy Harvesting cb3d95d4daf63de098833a0cc76b68b6 German Martinez Ayuso German Martinez Ayuso true false 2019-10-15 FGSEN Recently, the search of new materials with improved performance, such as higher strength, lower weight, fire resistance, less sensitive to fatigue,... has been fostered and driven by industries such as aerospace, energy, and nuclear. The development of composite materials has been an important step to achieve these goals since it allows the combination of di˙erent materials in order to improve the overall performance of the resulting composite. Composites, such as layered woven composites or mixtures, are already heavy used in industry. These composite materials are tailored to improve one or several specific properties, for example higher strength or lower weight. However, composite materials are able not only to improve the existing material properties but also to add new properties. Self-sensing capabilities have drawn significant attention recently due to the increasing requirements of safety and optimization. Self-sensing structures are able to provide information in real time about its current state. Often self-sensing systems are distributed in large structures which poses a problem for the energy supply. Piezoelectric materials have been studied in depth for energy harvesting due to its capability to convert strain to charge and charge to strain. This is known as the piezoelectric e˙ect and is used in many applications, from powering small devices to acoustic sensors. The use of these materials to harvest energy from the surrounding vibrations in the environment has been extensively studied by the scientific community, although commercial devices are still scarce.In this context, porous piezoelectric materials are a good option which can fulfil some of the above mentioned requirements: low density, strain-sensing capabilities and energy harvesting properties. Porous piezoelectric materials are composed of a piezoelectric material matrix with embedded air pores, which make them very light (up to 50% in some cases) while maintaining their piezoelectric properties. The presence of air reduces its material coeÿcients, such as sti˙ness, piezoelectric coupling and dielectric values, which opens the possibility to tailor the material properties by controlling the percentage of air inside the matrix. The reduction of capacitance is seen as beneficial for energy harvesting, since it reduces the wasted energy in the self-induced electric field. Therefore, the porous piezoelectric material are studied for energy harvesting applications. However, given the lack of reliable material models for these type of composite, it is seems the necessity to develop material models which can predict accurately the properties of the piezoelectric composite. This is a requirement prior to the use of the material in application or optimization. E-Thesis Swansea Piezoelectricity, Homogenization, Polarization, Porous materials, Energy harvesting, Impacts, Nonlinear 31 12 2018 2018-12-31 10.23889/Suthesis.52456 A selection of third party content is redacted or is partially redacted from this thesis. COLLEGE NANME Science and Engineering - Faculty COLLEGE CODE FGSEN Swansea University Doctoral Ph.D Ser Cymru National Research Network NRN-103 2022-12-18T10:04:10.1142207 2019-10-15T17:07:43.5916902 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised German Martinez Ayuso 1 0052456-15102019174718.pdf MartinezAyuso_German_PhD_Thesis_Final_Redacted.pdf 2019-10-15T17:47:18.6530000 Output 14207219 application/pdf Redacted version - open access true 2019-10-14T00:00:00.0000000 true
title Modelling of Porous Piezoelectric Material and Potential Applications to Vibration Energy Harvesting
spellingShingle Modelling of Porous Piezoelectric Material and Potential Applications to Vibration Energy Harvesting
German Martinez Ayuso
title_short Modelling of Porous Piezoelectric Material and Potential Applications to Vibration Energy Harvesting
title_full Modelling of Porous Piezoelectric Material and Potential Applications to Vibration Energy Harvesting
title_fullStr Modelling of Porous Piezoelectric Material and Potential Applications to Vibration Energy Harvesting
title_full_unstemmed Modelling of Porous Piezoelectric Material and Potential Applications to Vibration Energy Harvesting
title_sort Modelling of Porous Piezoelectric Material and Potential Applications to Vibration Energy Harvesting
author_id_str_mv cb3d95d4daf63de098833a0cc76b68b6
author_id_fullname_str_mv cb3d95d4daf63de098833a0cc76b68b6_***_German Martinez Ayuso
author German Martinez Ayuso
author2 German Martinez Ayuso
format E-Thesis
publishDate 2018
institution Swansea University
doi_str_mv 10.23889/Suthesis.52456
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Uncategorised{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Uncategorised
document_store_str 1
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description Recently, the search of new materials with improved performance, such as higher strength, lower weight, fire resistance, less sensitive to fatigue,... has been fostered and driven by industries such as aerospace, energy, and nuclear. The development of composite materials has been an important step to achieve these goals since it allows the combination of di˙erent materials in order to improve the overall performance of the resulting composite. Composites, such as layered woven composites or mixtures, are already heavy used in industry. These composite materials are tailored to improve one or several specific properties, for example higher strength or lower weight. However, composite materials are able not only to improve the existing material properties but also to add new properties. Self-sensing capabilities have drawn significant attention recently due to the increasing requirements of safety and optimization. Self-sensing structures are able to provide information in real time about its current state. Often self-sensing systems are distributed in large structures which poses a problem for the energy supply. Piezoelectric materials have been studied in depth for energy harvesting due to its capability to convert strain to charge and charge to strain. This is known as the piezoelectric e˙ect and is used in many applications, from powering small devices to acoustic sensors. The use of these materials to harvest energy from the surrounding vibrations in the environment has been extensively studied by the scientific community, although commercial devices are still scarce.In this context, porous piezoelectric materials are a good option which can fulfil some of the above mentioned requirements: low density, strain-sensing capabilities and energy harvesting properties. Porous piezoelectric materials are composed of a piezoelectric material matrix with embedded air pores, which make them very light (up to 50% in some cases) while maintaining their piezoelectric properties. The presence of air reduces its material coeÿcients, such as sti˙ness, piezoelectric coupling and dielectric values, which opens the possibility to tailor the material properties by controlling the percentage of air inside the matrix. The reduction of capacitance is seen as beneficial for energy harvesting, since it reduces the wasted energy in the self-induced electric field. Therefore, the porous piezoelectric material are studied for energy harvesting applications. However, given the lack of reliable material models for these type of composite, it is seems the necessity to develop material models which can predict accurately the properties of the piezoelectric composite. This is a requirement prior to the use of the material in application or optimization.
published_date 2018-12-31T04:04:50Z
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score 11.037166

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