Composite flexible skin with large negative Poisson's ratio range: numerical and experimental analysis

Yijin Chen, Fabrizio Scarpa, Ian R Farrow, Y. J. Liu, Jinsong Leng

Research output: Contribution to journalArticle (Academic Journal)peer-review

29 Citations (Scopus)


This paper describes the manufacturing, characterization and parametric modeling of a novel fiber-reinforced composite flexible skin with in-plane negative Poisson's ratio (auxetic) behavior. The elastic mechanical performance of the auxetic skin is evaluated using a three-dimensional analytical model based on the classical laminate theory (CLT) and Sun's thick laminate theory. Good agreement is observed between in-plane Poisson's ratios and Young's moduli of the composite skin obtained by the theoretical model and the experimental results. A parametric analysis carried out with the validated model shows that significant changes in the in-plane negative Poisson's ratio can be achieved through different combinations of matrix and fiber materials and stacking sequences. It is also possible to identify fiber-reinforced composite skin configurations with the same in-plane auxeticity but different orthotropic stiffness performance, or the same orthotropic stiffness performance but different in-plane auxeticity. The analysis presented in this work provides useful guidelines to develop and manufacture flexible skins with negative Poisson's ratio for applications focused on morphing aircraft wing designs.

Original languageEnglish
Article number045005
Number of pages12
JournalSmart Materials and Structures
Issue number4
Early online date26 Feb 2013
Publication statusPublished - Apr 2013


  • 62.20.D- Elasticity 81.40.Jj Elasticity and anelasticity, stress-strain relations 89.20.Kk Engineering 81.05.Ni Dispersion-, fiber-, and platelet-reinforced metal-based composites


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