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Measurement of the surface displacement in 1-3 piezo-composites.

Cain, M G; Stewart, M (2002) Measurement of the surface displacement in 1-3 piezo-composites. NPL Report. MATC(A)94

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Two methods for measuring the out-of-plane displacements of a range of 1-3 piezo-composites have been investigated. The first uses a surface profilometer to scan the surface profile of 1-3 piezo-composites under static DC conditions. The second uses a laser Doppler vibrometer to record dynamic surface displacement profile of the composites at various frequencies and electrical actuation drive level. Regions of composite that have lower than average piezoelectric element density exhibit a reduced overall displacement compared to regions that are more densely packed with piezoelectric phase. This is expected and the manner in which matrix and piezo-rod or fibre interacts, especially near the matrix fibre interface, as a function of frequency and voltage is discussed. The methods have been compared and ways in which the data may be visualised for greater understanding of the effect of composition, volume fraction, aspect ratio etc. have been explored.

Item Type: Report/Guide (NPL Report)
NPL Report No.: MATC(A)94
Subjects: Advanced Materials
Advanced Materials > Functional Materials
Last Modified: 02 Feb 2018 13:17
URI: http://eprintspublications.npl.co.uk/id/eprint/2329

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