Shape memory ceramic actuation of adaptive structures

Field-induced phase transitions in electroceramics with the advantages of large strain and shape memory are investigated as a mechanism for structural actuation. Several lanthanum and niobium doped lead zirconate stannate titanate compositions were manufactured and studied. The dependence of the material response on various factors relevant to structural actuation has been examined. Factors such as induced stress, actuation frequency, and temperature play an important role in the response of the material. A prototype adaptive structure using shape memory ceramic active materials has been constructed, tested, and used to validate model predictions.