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

• DOI: 10.1016/j.polymertesting.2022.107655
• Publication Date: 2022-06-07T00:08:13Z
• Authors: Dilshad Ahmad; Rafic M. Ajaj; Mohammadreza Amoo...
• Keywords: Morphing; Auxetics

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