characterization; frequency and amplitude dependence; Nanocomposites; nonlinear materials; stiffness and damping; Characterization; Epoxy; Epoxy-based nanocomposites; Frequency and amplitude dependences; Manufacturing process; Nanofiller; Nonlinear behaviours; Nonlinear materials; Stiffness and damping; Strain amplitude; Civil and Structural Engineering; Mathematics (all); Automotive Engineering; Aerospace Engineering; Condensed Matter Physics; Ocean Engineering; Mechanics of Materials; Mechanical Engineering
Abstract :
[en] The focus of this study is on the nonlinear mechanical properties of epoxy and epoxy-based nanocomposites, exploring frequency and strain amplitude dependency. Nanocomposite samples of epoxy are reinforced with fumed silica (FS), halloysite nanotubes (HNT) and Albipox 1000 rubber (Evonik) nanoparticles. Considering these particles have different geometries and stiffnesses, they are expected to have significantly different influences on the mechanics of the resulting composite. To enhance the reliability of the results and to reveal the impact of nanofillers on the mechanics of the material more distinctly, the manufacturing process is designed to be the same for all the specimens within the same material groups to eliminate the effects of the manufacturing process. The comprehensive characterization process consists of Fourier-Transform InfraRed Spectroscopy (FTIR), Scanning Electron Microscopy (SEM) and Dynamic Mechanical Analysis (DMA). The DMA tests are designed so that the material properties are measured depending on the vibration frequency and strain amplitude. Finally, the characterized nonlinear dynamic properties of these nanocomposites are used as the input material properties into a numerical model. In this simulation, a cantilever beam with representative nonlinear material properties, for these nanocomposites, is created, as example and its forced response is plotted under the same levels of excitation in the frequency domain. Key effects of the different nanofillers are identified using the resonance behavior, primarily focusing on the stiffness and damping of the epoxy-based nanocomposites. These experimental and numerical procedures followed show the significant impact of the nanoparticle reinforcements on the nonlinear nature of these epoxy-based composites.
Disciplines :
Mechanical engineering
Author, co-author :
Tüfekci, Mertol; Department of Mechanical Engineering, Imperial College London, London, United Kingdom
Baytak, Tuğba; Department of Civil Engineering, Istanbul Technical University, Maslak, Istanbul, Turkey
Bulut, Osman; Department of Civil Engineering, Istanbul Technical University, Maslak, Istanbul, Turkey
Pir, İnci; Faculty of Mechanical Engineering, Istanbul Technical University, Beyoğlu, Turkey
Acarer Arat, Seren; Department of Environmental Engineering, Istanbul University-Cerrahpaşa, Istanbul, Turkey
Özkal, Burak; Department of Metallurgical and Materials Engineering, Istanbul Technical University, Maslak, Istanbul, Turkey
Liu, Haibao; School of Engineering and Materials Science, Queen Mary University of London, London, United Kingdom
Dear, John P.; Department of Mechanical Engineering, Imperial College London, London, United Kingdom
Salles, Loïc ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Mechanical aspects of turbomachinery and aerospace propulsion
Language :
English
Title :
Nonlinear behaviour of epoxy and epoxy-based nanocomposites: an integrated experimental and computational analysis
Scientific and Technological Research Council of Turkey
Funding text :
This research is funded by Scientific and Technological Research Council of Turkey (T\u00DCB\u0130TAK) (fund B\u0130DEB 2213 2016/2) (Grant recipient: Mertol T\u00FCfekci). Mertol T\u00FCfekci would like to acknowledge the support of Scientific and Technological Research Council of Turkey (TUBITAK) (fund B\u0130DEB 2213 2016/2) that makes this research possible. The authors also would like to thank Evonik for the courtesy of providing materials and Dr.Dr.-Ing. Stephan Sprenger for his helpful guidance. The authors would like to express gratitude to Dr. Ruth Brooker for her invaluable and helpful guidance on experimental procedures and insightful advice throughout the research process. The authors would also like to acknowledge computational resources and support provided by the Imperial College Research Computing Service (http://doi.org/10.14469/hpc/2232).Mertol T\u00FCfekci would like to acknowledge the support of Scientific and Technological Research Council of Turkey (TUBITAK) (fund B\u0130DEB 2213 2016/2) that makes this research possible. The authors also would like to thank Evonik for the courtesy of providing materials and Dr.Dr.-Ing. Stephan Sprenger for his helpful guidance. The authors would like to express gratitude to Dr. Ruth Brooker for her invaluable and helpful guidance on experimental procedures and insightful advice throughout the research process. The authors would also like to acknowledge computational resources and support provided by the Imperial College Research Computing Service ( http://doi.org/10.14469/hpc/2232 ).
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