The paper discusses the approaches for the design and manufacturing of morphing skins based on square-shaped composite corrugated laminates and proposes a novel solution to integrate in the skin an elastomeric cover to prevent detrimental effects of corrugation on aerodynamic performances. Additionally, more complex corrugated shapes are presented and analysed. Design and manufacturing issues related to the production of corrugated laminates are discussed in detail, considering stiffness requirements derived from previously performed aeroelastic analyses of a morphing concept. A solution is proposed to integrate an elastomeric cover in the corrugated skin and a manufacturing process is presented and assessed. Moreover, a fully non-linear numerical model is developed and characterized to study the behaviour of this skin concept in different load conditions. Finally, configurations based on combination of square-shaped corrugated panels are considered. Their structural properties are numerically investigated by varying geometrical parameters. Performance indices are defined to compare structural stiffness contributions in non-morphing directions with the ones of conventional panels of the same weight. The overall results validate the design approaches and manufacturing processes to produce corrugated laminates and indicate that the solution for the integration of an elastomeric cover is a feasible and promising method to enhance the aerodynamic efficiency of corrugated skins. Numerical studies 2 also show that the extension of the concept to complex corrugated shapes may improve both the design flexibility and some specific performances with respect to simple corrugations.

Abstract. Development and experimental testing of a device for peristaltic pumping We present and discuss the results of the full experimental investigation of the actuator performance, measured in terms of its ability to reduce the pipe diameter, at a sustained frequency of 1.5 Hz. Moreover, we investigate how the diameter contraction is influenced ✿✿✿✿✿✿ affected ✿ by various design parameters as well as actuation frequencies up to 4 Hz. We manage to make the NiTi wire work at 3% in strain, cyclically providing the designed pipe wall displacement. The actuator performance is found to decay approximately linearly with actuation frequencies up to 4 Hz. Also, the interface between the wire and the aluminum parts is found to be essential in defining the actuator functional performance