Conference proceeding
Identification of Stochastic Manufacturing Defects Within Additively Manufactured Acoustic Liners
Annual International Solid Freeform Fabrication Symposium , 36
2025
DOI:
https://doi.org/10.7273/000008024
Appears in Aviation Sustainability Center (ASCENT)
Abstract
The exploration of novel acoustic engine liner designs using 3D internal lattices has become a growing topic of interest within the field of additive manufacturing (AM) and the aeroacoustics community. However, the comparison between the acoustic liner response of computational simulation using the design intent and experimental testing of as-built structure can show significant deviation. While the deviation in performance will be explored in a future publication, this work analyses possible causes of the deviation. A potential cause is the inclusion of stochastic manufacturing defects within the part. This paper establishes methods for systematically identifying and quantifying defects in the printing of novel acoustic liners. This approach intends to offer up significant insight into the build quality of the printed lattice structures without the cost and time investment typically required of computed tomography (CT) scanning. The core of the liner design analyzed in this paper is made up of a triply periodic minimal surface (TPMS) Schwarz P lattice. Error distributions of several design variables are found by taking manual measurements of printed liners. Additionally, liners are scored using an automated screening method to detect significantly flawed prints. The potential for error distributions to be used in stochastic simulation studies could help predict what effect manufacturing defects have on the behavior of structures that leverage TPMS lattices with small features such as acoustic liners.
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Details
- Title
- Identification of Stochastic Manufacturing Defects Within Additively Manufactured Acoustic Liners
- Creators
- Joseph Windows (Author) - Pennsylvania State UniversityAlden Packer (Author) - Pennsylvania State UniversityEric Nelson (Author)Jeffrey Chowaniec Jr. (Author)Jeffrey M. Mendoza (Author)C. Aaron Reimann (Author) - Pennsylvania State UniversityJulian Winkler (Author)Kenji Homma (Author) - Pennsylvania State UniversityNicholas Meisel (Author) - Pennsylvania State University
- Conference
- Annual International Solid Freeform Fabrication Symposium , 36
- Academic Unit
- Aviation Sustainability Center (ASCENT); Noise
- Grants
- 13-C-AJFE-PSU-113, Federal Aviation Administration (United States, Washington) - FAA
- Identifiers
- 99901364590001842
- Language
- English
- Resource Type
- Conference proceeding