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- W2117222603 abstract "The blades of helicopter rotors and turbine blades can be modeled as pretwisted beams/plates or shells. The angle of pretwist can affect the performance of these turbo-machinery systems. Being able to actively change the angle of pretwist even moderately can enhance or optimize these systems for various modes of operation. To actively change the angle of pretwist, a torque has to be introduced to the pretwist member that will cause it to either increase or decrease the existing pretwist angle of the blade. By building piezoelectric layers into the blade/plate and applying a controlled voltage the shape and or position of the cross- section can be changed. Due to the coupling of both bending modes and the extensional and torsional modes in pretwisted members a piezoelectric materials that can induce extension in the plate can also be used to twist or bend the shape of the plate. In this study a cantilevered pretwisted plates bonded to two piezoelectric layers on the outside is modeled using 3D linear elastic finite element approach with the pretwist built into the formulation. The static response of the pretwisted plate to a uniform voltage applied to the piezoelectric layers is investigated. Twisting and bending of the plate is accomplished through coupling of the bending modes and extensional-torsional coupling. The piezoelectric layer itself is not isotropic and so introduces additional coupling into the system.© (1999) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only." @default.
- W2117222603 created "2016-06-24" @default.
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- W2117222603 date "1999-07-09" @default.
- W2117222603 modified "2023-09-23" @default.
- W2117222603 title "<title>Twisting and bending of pretwisted piezoelectric plates</title>" @default.
- W2117222603 doi "https://doi.org/10.1117/12.351583" @default.
- W2117222603 hasPublicationYear "1999" @default.
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