Innovative Skin Structures: Synthesis, Void Analysis, and Hysteresis Modeling of Zero Poisson’s Ratio Skin for Span Morphing Wing

Author:

Ahmad Dilshad1ORCID,Gour Sankalp2ORCID,Kumar Deepak2ORCID,Ajaj Rafic M.1ORCID,Zweiri Yahya1ORCID

Affiliation:

1. Advanced Research and Innovation Center (ARIC), Department of Aerospace Engineering, Khalifa University of Science and Technology, Abu Dhabi 127788, UAE

2. Department of Mechanical Engineering, Maulana Azad National Institute of Technology, Bhopal, Madhya Pradesh 462003, India

Abstract

This paper explores the use of carbon fiber-reinforced elastomeric skins for advancing flexible morphing wing technologies, highlighting exceptional 1D morphing capabilities. The study focuses on synthesizing a specially engineered elastomer-based skin with a zero Poisson’s ratio, achieved through precise formulation and fabrication onto unidirectional carbon fiber. Poisson’s ratio of the 1D skin is confirmed to be zero via image analysis. Micro-CT tomography evaluates carbon fiber quality and voids under varied prestretch conditions, revealing proportional increases in void sizes. X-ray tomography also provides insights into void distribution and morphology during pre- and post-cyclic stretching. The innovative approach enables seamless 1D morphing, achieving an impressive 200% stretch with a slight increase in actuation force and hysteresis loss percentage. Inspired by continuum mechanics, the proposed “Exp-ln-ln” framework accurately models the loading–unloading stretching of the skin. An extensive parametric investigation assesses key parameters, advancing fiber-reinforced elastomeric materials for aerospace morphing skins.

Funder

Advanced Research and Innovation Center

Publisher

World Scientific Pub Co Pte Ltd

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