| 摘要 |
<p>High performance electromechanical devices suitable for a wide range of applications are described. The electroactive devices are capable of operating in a manner that offers enhanced mechanical displacement responses and increased load-bearing capabilities. In one embodiment, the device is capable of providing a significantly increased level of free displacement. The electroactive devices include an electroactive composite (32, 33) which includes at least on elctroactive material (32b, 33b) composite which that may comprise an elctrostrictive or a piezoelectric material on a support (32a, 33a) and a tensioning device (31) which is adapted for inducing a mechanical pre-load to the electroactive composite structure. The tensioning device exerts a mechanical pre-load upon the eletroactive material which alters stress profile, increases mechanical energy and increases stored elastic energy of the electroactive devices.</p> |
