Session: 07-01: NDE for Additive Manufacturing
Paper Number: 95348
95348 - Damage Localization in 3d-Printed Plates With Different Infill Densities
Abstract
The growth of the use of additive manufacturing techniques for prototypes and industrial components implies the need to search for effective tools for damage detection, localization, size estimation, and identification. This study focuses on guided wave propagation and their interaction in the printed components. The material under investigation is the printed poly(lactic acid) (PLA) used to manufacture flat plates. A few plates were prepared with varying infill densities. Lower infill density allows to save material for printing but it influences the guided wave propagation behavior. In order to study the damage localization strategies plates with and without internal artificial defects were prepared. So, for each infill density, there was a healthy and damaged plate prepared. The guided waves in the plates were excited with surface-mounted piezoelectric transducers, while the sensing was realized with a scanning laser Doppler vibrometer. The excitation signal was a 5-cycle-long tone burst. A few frequencies were used for comparison purposes. Thanks to whole-surface scanning, the investigated damage imaging strategies were based on the whole wave field as well as on discrete points chosen from the scanned grid. The obtained results show a good potential of guided-wave-based techniques for the structural health monitoring of 3D-printed structures.
Acknowledgments
The authors acknowledge the funding support provided by the National Science Center, Poland under the OPUS project entitled: Health monitoring of ADditively manufactured structurES (HADES) (2019/35/B/ST8/00691).
Presenting Author: Pawel Malinowski Institute of Fluid Flow Machinery Polish Academy of Sciences
Damage Localization in 3d-Printed Plates With Different Infill Densities
Paper Type
Abstract