| EPSRC Reference: |
GR/R05024/01 |
| Title: |
Micro-Dynamics of Regular and Auxetic Cellular Solids |
| Principal Investigator: |
Scarpa, Professor F |
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| Department: |
Mechanical Engineering |
| Organisation: |
University of Sheffield |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 March 2001 |
Ends: |
28 February 2003 |
Value (£): |
53,668
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| No relevance to Underpinning Sectors |
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Summary on Grant Application Form |
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This project is concerned with a detailed study of the dynamic behaviour of regular and auxetic (negative Poisson's ratio) cellular materials in the frequency range between 5 kHz and 25 kHz. This frequency range covers most of the acoustic fatigue loading on mechanical and aerospace structures where cellular solids (honeycomb and foams) are used. Samples of regular and auxetic honeycombs will be subjected to in-plane periodic excitations with piezo-electric patches, and the structural velocities within the unit cells of the solids will be detected using a multi-scanning laser vibrometer. The experiment will represent an in-plane wave propagation field in cellular solids. A special test rig will be built to conduct the tests. The measurement data will be used to update numerical (Finite Element) models of the microstructures for wave propagation constant computations. The models will be based on wave propagation methods for multiconnected periodic structures. Initially, samples with well-defined core material properties, such as regular aluminium honeycombs, will be used to validate and benchmark the experimental and numerical techniques. The wave dispersion and dynamic characteristics of general and auxetic honeycombs will then be investigated using different unit cell geometry and core material (Nomex) samples.
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Key Findings |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Potential use in non-academic contexts |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Impacts |
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| Description |
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk |
| Summary |
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| Date Materialised |
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Sectors submitted by the Researcher |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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| Project URL: |
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| Further Information: |
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| Organisation Website: |
http://www.shef.ac.uk |