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Research Article

Evaluation of low-velocity impact behavior of epoxy nanocomposite laminates modified with SiO2 nanoparticles at cryogenic temperatures

Ahmet C. Tatar1, Halil B. Kaybal2, Hasan Ulus*,1, Okan Demir1 and Ahmet Avcı3

1Department of Mechanical Engineering, Konya Technical University, Konya, Turkey

2Department of Mechanical Engineering, Amasya University, Amasya, Turkey

3Department of Biomedical Engineering, Necmettin Erbakan University, Konya, Turkey

Keywords

Abstract

Glass fiber;

Epoxy composite;
 
Cryogenic temperature;
 
Low-velocity impac
t

Epoxy based fiber reinforced composites are widely utilized in aerospace applications due to mechanical properties, thermal stability and, chemical resistance. However, it is known that materials become brittle and due to the poor crack resist restricts their applications in cryogenic engineering applications. The purpose of this paper is to experimentally investigate the cryogenic temperatures’ effect on the low-velocity impact (LVI) test of composite laminates. In addition, the effect of matrix modification in the studied composites was investigated. The LVI tests were conducted at RT (room temperature), 0 °C, -50 °C, -150 °C and -196 °C (liquid nitrogen temperature) on the composite laminates to measure influence on their energy absorption capacity. LVI tests performed according to ASTM-D-7136 standard under 10, 20 and 30 J impact energy levels. The results show that the contact forces and energy absorption capacities are improved by adding SiO2 nanoparticles into the epoxy matrix. The absorbed energy at cryogenic temperatures is increased by 24.87% from 18.1 J of pure epoxy resin to 22.7 J of modified epoxy. For the purpose of comparison, the LVI properties of composites at room temperature (RT) are also investigated. It is noted that the energy absorption capacity is not higher at cryogenic temperatures than that at RT for the modified and neat epoxy composites. Moreover, the peak contact forces are reduced in low-temperature conditions.

 © 2019 MIM Research Group. All rights reserved.

DOI: http://dx.doi.org/10.17515/resm2018.55is0704                          Full Text

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07/01/2019 Collaboration for IMSMATEC 2019: Editorial Board of our journal and Organizing Committee of The International Conference on Materials Science, Mechanical and Automotive Engineerings and Technology (IMSMATEC 2019) have agreed to collaborate. Extended versions of the selected papers from the conference will be published in our journal. For more see Events.


25/12/2018 Collaboration for iSTE-CE'2019: Editorial Board of our journal and Organizing Committee of International Conference on Innovation, Sustainability, Technology and Education in Civil Engineering (iSTE-CE'2019) have agreed to collaborate. Extended versions of the selected papers from the conference will be published in our journal. For more see Events.


23/12/2018 2018 Most Cited Paper Award: The paper authored by Jouni Freud and Alp Karakoç entitled as “Shear and torsion correction factors of Timoshenko beam model for generic cross sections" is awarded the 2018 Most Cited Paper Award of Research on Engineering Structures and Materials (RESM). We congratulate the authors and wish them a continued success.


23/12/2018 2018 Best Paper Award: The paper authored by Nelson C. Batista, Rui Melicio and Victor M. F. Mendes entitled as “Darrieus vertical axis wind turbines: methodology to study the self start capabilities considering symmetric and asymmetric air foils” is awarded the 2018 Best Paper Award of Research on Engineering Structures and Materials (RESM). We congratulate the authors and wish them a continued success.


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