Full-field surface pressure reconstruction using the virtual fields method
Full-field surface pressure reconstruction using the virtual fields method
This work presents a methodology for reconstructing full-field surface pressure information from deflectometry measurements on a thin plate using the Virtual Fields Method (VFM). Low-amplitude mean pressure distributions of the order of few O(100) Pa from an impinging air jet are investigated. These are commonly measured point-wise using arrays of pressure transducers, which require drilling holes into the specimen. In contrast,the approach presented here allows obtaining a large number of data points on the investigated specimen without impact on surface properties and flow. Deflectometry provides full-field deformation data on the specimen surface with remarkably high sensitivity. The VFM allows extracting information from the full-field data using the principle of virtual work. A finite element model is employed in combination with artificial grid deformation to assess the uncertainty of the pressure reconstructions. Both experimental and model data are presented and compared to show capabilities and restrictions of this method.
1203–1221
Kaufmann, Rene
a3e497b4-b9a0-4bce-8f03-8fa09f574aeb
Ganapathisubramani, Bharathram
5e69099f-2f39-4fdd-8a85-3ac906827052
Pierron, Fabrice
a1fb4a70-6f34-4625-bc23-fcb6996b79b4
October 2019
Kaufmann, Rene
a3e497b4-b9a0-4bce-8f03-8fa09f574aeb
Ganapathisubramani, Bharathram
5e69099f-2f39-4fdd-8a85-3ac906827052
Pierron, Fabrice
a1fb4a70-6f34-4625-bc23-fcb6996b79b4
Kaufmann, Rene, Ganapathisubramani, Bharathram and Pierron, Fabrice
(2019)
Full-field surface pressure reconstruction using the virtual fields method.
Experimental Mechanics, 59 (8), .
(doi:10.1007/s11340-019-00530-2).
Abstract
This work presents a methodology for reconstructing full-field surface pressure information from deflectometry measurements on a thin plate using the Virtual Fields Method (VFM). Low-amplitude mean pressure distributions of the order of few O(100) Pa from an impinging air jet are investigated. These are commonly measured point-wise using arrays of pressure transducers, which require drilling holes into the specimen. In contrast,the approach presented here allows obtaining a large number of data points on the investigated specimen without impact on surface properties and flow. Deflectometry provides full-field deformation data on the specimen surface with remarkably high sensitivity. The VFM allows extracting information from the full-field data using the principle of virtual work. A finite element model is employed in combination with artificial grid deformation to assess the uncertainty of the pressure reconstructions. Both experimental and model data are presented and compared to show capabilities and restrictions of this method.
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Full-Field Surface Pressure Reconstruction Using the Virtual Fields Method
- Accepted Manuscript
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Kaufmann 2019 Article Full-Field Surface Pressure
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Accepted/In Press date: 14 June 2019
e-pub ahead of print date: 24 July 2019
Published date: October 2019
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Local EPrints ID: 432382
URI: http://eprints.soton.ac.uk/id/eprint/432382
ISSN: 0014-4851
PURE UUID: 12123a98-0fdc-419b-bbab-93e0807400a3
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Date deposited: 12 Jul 2019 16:30
Last modified: 16 Mar 2024 08:00
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Author:
Rene Kaufmann
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