Abstract
This paper presents the results of measurements of free displacement and blocked forcegenerated from piezo-composite unimorph actuators made from three differentsubstrate materials (aluminium, brass and mild steel) of different thicknesses. Valuesof free displacement and blocked force were compared with the results from afinite-element analysis. An actuator with stiffer substrate material provides relativelylarger force and less displacement. Conversely, greater displacement and less forceare obtained from a less stiff substrate. It is hoped that this information will beuseful to designers in selecting the appropriate size and substrate material inapplications, depending on whether the desired goal is large displacement or large force.
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