Active inflatable auxetic honeycomb structural concept for morphing wingtips

Jian Sun*, Hongliang Gao, Fabrizio Scarpa, Cristian Lira, Yanju Liu, Jinsong Leng

*Corresponding author for this work

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

35 Citations (Scopus)


This paper describes a new concept of an active honeycomb structure for morphing wingtip applications based on tubular inflatable systems and an auxetic cellular structure. A work-energy model to predict the output honeycomb displacement versus input pressure is developed together with a finite element formulation, and the results are compared with the data obtained from a small-scale example of an active honeycomb. An analysis of the hysteresis associated with multiple cyclic loading is also provided, and design considerations for a larger-scale wingtip demonstrator are made.

Original languageEnglish
Article number125023
JournalSmart Materials and Structures
Issue number12
Publication statusPublished - 1 Dec 2014


  • active honeycomb
  • hysteresis
  • inflatable structures
  • modelling
  • morphing wingtip


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