Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
On the potential of injection moulding for the production of locally resonant metamaterials
Submission Author:
Kristof Steijvers , / , Belgium
Co-Authors:
Kristof Steijvers, Claus Claeys, Lucas Van Belle, Elke Deckers
Presenter: Kristof Steijvers
doi://10.26678/ABCM.COBEM2021.COB2021-2334
Abstract
Locally resonant metamaterials have recently emerged as promising lightweight solutions for noise and vibration control. These materials allow the creation of stop bands, frequency ranges of strong noise and vibration reduction, by the addition or inclusion of resonant structures on or in a host structure on a sub-wavelength scale. As the currently used techniques for the production of LRMs are not suited for mass production, this paper investigates the suitability of the well-established injection moulding production process for the creation of LRMs. This conventional production process comes with a multitude of advantages, such as low cycle times, low cost for mass production and high repeatability, which make it highly appealing for the manufacturing of LRMs. Based on several resonator designs which have been tailored for the injection moulding process, multiple mould inserts are manufactured after which the repeatability of the injection moulding process is quantified by assessing produced resonator geometry and vibration responses. The measured resonance frequencies show that the IM process is highly repeatable, although the material and process settings can influence the resonator dynamics. Compared to finite element method simulation results, additional update steps can be of use to increase the agreement between experimental and numerical results.
Keywords
Vibro-acoustic, Metamaterials, injection moulding, Manufacturing
