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Journal of Intelligent Material Systems and Structures
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Exact Solutions of Functionally Gradient Piezothermoelastic Cantilevers and Parameter Identification

Chen Ying

School of Civil Engineering, Beijing Jiaotong University, Beijing, 100044, China

Shi Zhifei

School of Civil Engineering, Beijing Jiaotong University, Beijing, 100044, China, zfshi178{at}sohu.com

Based on the theory of elasticity, some exact solutions of functionally gradient piezothermoelastic cantilevers under different coupled loadings are obtained. As an application, these solutions have been successfully used to identify the gradient piezoelectric parameter and the thermal material coefficients. Besides, some numerical results have been carried out for the cantilever under two different kinds of loadings. It is found that the tip deflection of the cantilever agrees very well with the experimental and theoretical findings provided by other investigations. The present study also shows that the linear change of thermal material parameters does not influence the distribution of the stress and induction of the cantilever. But it influences the components of strain and electric field strength as well as the displacement and electric potential of the cantilever.

Key Words: FGM • piezothermoelastic material • sensors and actuators • inverse problem • parameter identification

Journal of Intelligent Material Systems and Structures, Vol. 16, No. 6, 531-539 (2005)
DOI: 10.1177/1045389X05053208
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