FREE VIBRATION ANALYSIS IN INNOVATIVE 3D PRINTING SANDWICH PANAELS FOR AIRCRAFT STRUCTURE

Sadiq Emad Sadiq; Hayder Zuhair Zainy; Roaa  Mohammed Muneer; Luay S. Al-Ansari

doi:10.30572/2018/KJE/160116

Authors

Sadiq Emad Sadiq Department of Aeronautical Technical Engineering, Technical Engineering College of Najaf, Al-Furat Al-Awsat Technical University,54001,Najaf,Iraq https://orcid.org/0000-0002-9857-6360
Hayder Zuhair Zainy Mechanical Engineering Department, Faculty of Engineering, University of Kufa, Iraq https://orcid.org/0009-0005-8751-7364
Roaa Mohammed Muneer Al-Mussaib Technical Institute, Al-Furat Al-Awsat Technical University, 51006 Babil, Iraq https://orcid.org/0000-0003-4220-6202
Luay S. Al-Ansari Mechanical Engineering Department, Faculty of Engineering, University of Kufa, Iraq https://orcid.org/0000-0002-2989-8614

DOI:

https://doi.org/10.30572/2018/KJE/160116

Keywords:

Free Vibration, Sandwich Beam, ANSYS Software, Natural Frequency, Polylactic Acid (PLA)

Abstract

Sandwich panel structures are composed of three layers: core and two facings. The configuration of the core deeply influences the mechanical properties of the sandwich panel. Numerous innovative core shapes have been proposed to enhance these properties; however, many have not been implemented due to manufacturing difficulties, particularly spherical shapes. This research aims to address this manufacturing challenge by utilizing 3D printing technology to produce sandwich panels with a spherical core. Additionally, the study investigates the effects of varying design parameters like sphere diameter, offset distance and face thickness on the free vibration features of the sandwich panels experimentally and numerically. Experimental tests validated the finite element models with an error margin below 12%. The key parameters explored were spherical diameter (3-12mm), offset distance (10-33mm), and face thickness (1-5mm). The results demonstrate a direct correlation between these parameters and the sandwich beam natural frequency.

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