PSI - Issue 33

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000 – 000

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 33 (2021) 685–694

© 2021 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 scientific committee of the IGF ExCo Abstract In the present work, the effect of low-speed impact on the static residual strength of aluminum foam sandwiches having GFRP skins has been evaluated. Two different configurations have been considered, which differs both for thickness and layup used for the manufacturing of GFRP skins. The detection and the quantification of the damage induced by impact have exploited the potentiality of pulsed thermography and phased array ultrasonic techniques, which gives the possibility to provide synergistic and complementary information. Mechanical strength has been evaluated through three-point bending tests carried out on undamaged and damaged specimens. Static tests allowed also evaluating the failure mode of panels and the changes induced by the presence of a low-speed impact zone. © 2021 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 Statement: Peer-review under responsibility of the scientific committee of the IGF ExCo Keywords: bending test; composite; impact damage; pulsed thermography; sandwich; ultrasonic testing. 1. Introduction A sandwich composite material results from the assembly (or welding) of two thin skins, typically made of materials with good mechanical characteristics (high strength and high Young's modulus), and a much thicker core with low density and good mechanical compression properties, such as metal foams [Cho et al. (2012), Tan et al. (2013)]. In recent years, the development of metal foams has increased significantly due to specific mechanical properties such as low weight, high stiffness and compression strength. These components could offer a great IGF26 - 26th International Conference on Fracture and Structural Integrity Bending residual strength of damaged Al foam sandwiches through UT and IRT analyses R. Nobile a , F. W. Panella a , A. Pirinu a *, A. Saponaro a a University of Salento – Department of Innovation Engineering, Via Lecce-Monteroni, Lecce – 73100, Italy

* Corresponding author. Tel.: +39 (0)832 297786; fax: +39 (0)832 297768 E-mail address: alessandra.pirinu@unisalento.it

2452-3216 © 2021 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 Statement: Peer-review under responsibility of the scientific committee of the IGF ExCo

2452-3216 © 2021 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 scientific committee of the IGF ExCo 10.1016/j.prostr.2021.10.076