Accession Number : ADA317561

Title :   Fracture and Fatigue of Piezoelectric Ceramics and Development of an Adaptive Sandwich Structure.

Descriptive Note : Final rept. 1 Aug 92-31 May 96,

Corporate Author : PURDUE UNIV LAFAYETTE IN SCHOOL OF AERONAUTICS AND ASTRONAUTICS

Personal Author(s) : Sun, C. T.

PDF Url : ADA317561

Report Date : OCT 1996

Pagination or Media Count : 89

Abstract : Smart materials such as SMA and piezoelectric materials offer promising applications in many adaptive structures enabling the development of new structural control. Potential applications include shape control of large space structures, active noise and vibration control, flutter suppression, and microservoelasticity in flight vehicles. To deliver the maximum actuation power, piezoelectric actuators are subjected to high electric fields and strains. The development of reliability and life prediction methodologies for piezoceramics is of vital importance to the technology of smart structures. The result of this research concerning the behavior of fracture and fatigue crack growth in PZT piezoceramics under combined electrical and mechanical loads is an important step to the aforementioned goal.

Descriptors :   *FRACTURE(MECHANICS), *CERAMIC MATERIALS, *PIEZOELECTRIC MATERIALS, *ADAPTIVE SYSTEMS, *FATIGUE(MECHANICS), *SANDWICH CONSTRUCTION, CONTROL, VIBRATION, SPACECRAFT, STRUCTURAL PROPERTIES, MATERIALS, LOADS(FORCES), SHAPE, ELECTRIC FIELDS, RELIABILITY, CRACK PROPAGATION, INFLIGHT, LEAD COMPOUNDS, POWER, ACTUATORS, VEHICLES, NOISE, TITANATES, ACTUATION, SUPPRESSION, ZIRCONATES, FLUTTER, ELECTRICAL LOADS.

Subject Categories : Ceramics, Refractories and Glass
      Electricity and Magnetism
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE