@article {Cheer:2020:0736-2935:5255,
title = "On the potential of a functionally graded acoustic black hole using multi-material additive manufacturing",
journal = "INTER-NOISE and NOISE-CON Congress and Conference Proceedings",
parent_itemid = "infobike://ince/incecp",
publishercode ="ince",
year = "2020",
volume = "261",
number = "1",
publication date ="2020-10-12T00:00:00",
pages = "5255-5261",
itemtype = "ARTICLE",
issn = "0736-2935",
url = "https://ince.publisher.ingentaconnect.com/content/ince/incecp/2020/00000261/00000001/art00032",
author = "Cheer, Jordan and Daley, Steve",
abstract = "Acoustic Black Holes (ABHs) have been demonstrated as an effective and particularly lightweight passive vibration control solution. They are able to achieve a high level of structural damping with a thin layer of concentrated damping material by introducing a reduction in the structural
wave speed. This is generally achieved by introducing a geometrical taper into the structure and the performance is maximised with a long taper that reaches a small tip height. This design approach introduces a potential weakness into the structure and, therefore, this paper explores an alternative
method of achieving a reduction in the wave speed. Instead of a geometrical taper, the potential of realising the ABH effect using a functionally graded structural feature that can be achieved through multi-material additive manufacturing is investigated. Requirements on the gradient of the
material properties are first investigated and then a design optimisation strategy is presented to enable the practical realisation within the constraints of a commercially available multi-material additive manufacturing process.",
}