PSI - Issue 47

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2018) 000–000

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 47 (2023) 579–588

© 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the IGF27 chairpersons Abstract Nowadays, active composite materials with shape-morphing capabilities are becoming increasingly used, this is mainly due their efficiency and weight reduction. Smart material like Shape Memory Alloys (SMAs) can be used for these application as embedded actuators. Indeed, from aerospace to automotive field these components can increase the aerodynamic performance by continuous morphable surface and are able to simplify the models by reducing the quantity of movable parts. A design solution for an SMA polymer composite plate with morphing capabilities was developed and manufactured by 3D printing processes. Furthermore, a simple and effective analytical model was developed to predict the shape morphing properties of the active composite. The accuracy of the model was verified through comparison with experimental data obtained from the developed prototypes. © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo. 1. Introduction Shape Memory Alloys (SMAs) belong to a unique class of materials that are able to recover their shape under the application of a thermal load [1, 2], therefore an increase in temperature results in a phenomenon of shape recovery, also under the action of antagonistic applied load, it is possible to obtain important results in terms of actuation energy density [3] in comparison with other alloys that exhibit the same effect. This effect, named shape memory effects, is directly accountable to the thermo-elastic martensitic transformation that these metal alloys manifest, implying the presence of austenitic phase (A) at high temperatures and Martensitic (M) at low temperatures. The phase change that act on SMAs is characterized by four characteristic temperatures, the martensite start and finish temperature (TMs and IGF Workshop “Fracture and Structural Integrity” SMA-Polymer Composite Made by 3D Printing: Modelling and Experiments Stefano Rodinò* a , Elio Matteo Curcio a , Emanuele Sgambitterra a , Carmine Maletta a a Department of Mechanical Energy and Management Engimneering, Univeristy of Calabria, P. Bucci 44C, 87036 Rende, Italy Keywords: Shape memory alloys, Active composite, Shape-morphing, Actuators, NiTi, MatLab

* Corresponding author. E-mail address: stefano.rodino@unical.it

2452-3216 © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo.

2452-3216 © 2023 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the IGF27 chairpersons 10.1016/j.prostr.2023.07.066