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Elastomer-based skins for morphing aircraft applications: Effect of biaxial strain rates and prestretch

Ahmad, Dilshad; Ajaj, Rafic M.; Amoozgar, Mohammadreza

Elastomer-based skins for morphing aircraft applications: Effect of biaxial strain rates and prestretch Thumbnail


Authors

Dilshad Ahmad

Rafic M. Ajaj



Abstract

There is an emerging trend in the morphing aircraft research where two or more morphing degrees of freedom are used on a wing which leads to the concept of polymorphing. The skin of the morphing wing must be flexible in the morphing direction but stiff in other directions to withstand the aerodynamic loads and maintain the airfoil shape. Polymorphing changes the loadings profile (from uniaxial to biaxial) and increases the complexity of designing suitable morphing skins. Furthermore, elastomeric materials used on morphing wings are usually prestretched to prevent wrinkling and to increase their out-of-plane stiffness. This paper focuses on elastomeric morphing skins and it studies the effect of biaxial strain rates and prestretch ratios on important mechanical properties such as stiffness, hysteresis losses (%), and stress relaxations (%) from an experimental perspective. Three polymeric materials are considered: Latex, Oppo, and Ecoflex. This study provides a mechanical comparative understanding of the three polymers used in the morphing wing under biaxial loading (two morphing degrees of freedom).

Citation

Ahmad, D., Ajaj, R. M., & Amoozgar, M. (2022). Elastomer-based skins for morphing aircraft applications: Effect of biaxial strain rates and prestretch. Polymer Testing, 113, Article 107655. https://doi.org/10.1016/j.polymertesting.2022.107655

Journal Article Type Article
Acceptance Date May 31, 2022
Online Publication Date Jun 6, 2022
Publication Date Sep 1, 2022
Deposit Date Jun 13, 2022
Publicly Available Date Mar 29, 2024
Journal Polymer Testing
Print ISSN 0142-9418
Publisher Elsevier BV
Peer Reviewed Peer Reviewed
Volume 113
Article Number 107655
DOI https://doi.org/10.1016/j.polymertesting.2022.107655
Keywords Polymers and Plastics; Organic Chemistry
Public URL https://nottingham-repository.worktribe.com/output/8494662
Publisher URL https://www.sciencedirect.com/science/article/pii/S0142941822001775?via%3Dihub

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