Quasi-static thermo-electro-mechanical behaviour of piezoelectric stack actuators
| dc.contributor.author | Mumford, D | |
| dc.contributor.author | Rajapakse, R K N D | |
| dc.contributor.author | Gadala, Mohamed S. | |
| dc.contributor.author | ETAL.. | |
| dc.date.accessioned | 2021-12-26T17:57:42Z | |
| dc.date.accessioned | 2023-08-23T05:13:04Z | |
| dc.date.available | 2021-12-26T17:57:42Z | |
| dc.date.available | 2023-08-23T05:13:04Z | |
| dc.date.issued | 2008-01 | |
| dc.description | Piezoelectric ceramics have played an important role inactuator applications due to their excellent electromechanical coupling properties and ultra-fast response [1]. Piezoelectric actuators can generally be classified into two categories [2–4],i.e. (a) rigid displacement devices, for which the strain is induced uni-directionally along an applied direct current (dc) or pulse field, such as servo displacement positioners and actuators of dot-matrix printers, etc; and (b) resonating displacement devices, for which the alternating strain is excited by an alternating current (ac) field at the mechanical resonance frequency, such as ultrasonic piezomotors. The developmentof co-fired multi-layer technology has made it possible to generate a relatively large displacement in a piezoceramic stack actuator with a low driving voltage. Because they offer quick response, compactness and low power consumption, piezoelectric stack actuators are being investigated for fuel injection systems in the automotive industries and are considered a very competitive candidate for next-generation fuel injectors for clean engine technology | en_US |
| dc.description.abstract | Quasi-static thermo-electro-mechanical performance of annular and solid cylindrical piezoelectric actuators was studied by experimental means under electric fields varying from 0.3 to 1.8 kV mm−1 with a preload of 4.6 MPa over the temperature range of −30 to 125 °C. It was found that, for both annular and solid actuators, the electrically induced stroke increases steadily with temperature. Under electric fields larger than 1.0 kV mm−1, a nonlinear transition zone exists in the stroke–temperature plot over the temperature range 25–50 °C. The dielectric constant was also found to increase with temperature. Preload dependence of displacement was measured up to 42 MPa at room temperature and found to be negligible below 30 MPa. A mathematical model that includes the linear piezoelectric effect and 90° domain switching effect was used to model the experimental results. The model shows reasonable agreement with experimental results at low and high driving fields. | en_US |
| dc.identifier.citation | Li, F. X., Rajapakse, R. K. N. D., Mumford, D., & Gadala, M. (2008). Quasi-static thermo-electro-mechanical behaviour of piezoelectric stack actuators. Smart Materials and Structures, 17(1), 015049. | en_US |
| dc.identifier.doi | https://doi.org/10.1088/0964-1726/17/1/015049 | |
| dc.identifier.uri | https://dspace-uat.adu.ac.ae/handle/1/1989 | |
| dc.language.iso | en | en_US |
| dc.publisher | IOPScience | en_US |
| dc.subject | Quasi-static | en_US |
| dc.subject | mechanical | en_US |
| dc.subject | piezoelectric stack | en_US |
| dc.subject | temperature | en_US |
| dc.title | Quasi-static thermo-electro-mechanical behaviour of piezoelectric stack actuators | en_US |
| dc.title.alternative | Smart Materials and Structures, Volume 17, Number 1 Citation F X Li et al 2008 Smart Mater. Struct. 17 015049 | en_US |
| dc.type | Article | en_US |