Design and analysis of flexible skin based on zero Poisson's ratio hybrid honeycomb

Chang Zhao; Li Zhou; Tao Qiu

doi:10.1117/12.2511421

27 March 2019 Design and analysis of flexible skin based on zero Poisson's ratio hybrid honeycomb

Chang Zhao, Li Zhou, Tao Qiu

Proceedings Volume 10970, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2019; 109702K (2019) https://doi.org/10.1117/12.2511421
Event: SPIE Smart Structures + Nondestructive Evaluation, 2019, Denver, Colorado, United States

Abstract

Morphing aircraft can change external shape in flight according to different flight environments and tasks, and improve flight performance maximumly. Among them, the morphing wing can improve the aerodynamic performance efficiently and has become one of the hot spots in recent years. One of the key technologies for morphing wing is flexible skin technique. Aiming at the conflict between in-plane deformation and out-of-plane bearing capacity of flexible skin structure design, a zero Poisson's ratio hybrid honeycomb structure was designed. The strips are added to the honeycomb structure to form a hybrid honeycomb, which increases the out-of-plane bending stiffness. Three different shapes of honeycomb grid elements were proposed, which are cruciform, square, and H-shaped. By adjusting the shape and size parameters of the three kinds of honeycomb grid elements and the height and quantity of the laying strips, the in-plane deformation mechanism of each element was analyzed by the representative volume element method, as well as the variation of mechanical properties with the element and strip shape parameters. The mechanical properties of the hybrid honeycomb structure were analyzed by finite element simulation. Considering the requirements of the variable camber trailing edge wing, a flexible skin which has capacity of out-of-plane bending resistance was constituted by covering elastic panel over the surface of zero Poisson's ratio hybrid honeycomb. The flexible skin structure has good airtightness and smooth surface. Also, it meets the requirements of in-plane unidirectional deformation along with out-of-plane bearing capacity.

Citation Download Citation

Chang Zhao, Li Zhou, and Tao Qiu "Design and analysis of flexible skin based on zero Poisson's ratio hybrid honeycomb", Proc. SPIE 10970, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2019, 109702K (27 March 2019); https://doi.org/10.1117/12.2511421

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KEYWORDS

Skin

Silicon

Shape analysis

Resistance

Foam

Structural design

Finite element methods

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