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Indentation responses of piezoelectric films
Frictionless indentation responses of transversely isotropic piezoelectric film/rigid substrate systems under circular cylindrical indenter (i.e., punch), conical indenter (i.e., cone), and spherical indenter (i.e., sphere) are investigated. Both insulating and conducting indenters are considered. The technique of Hankel transformation is employed to derive the corresponding dual integral equations for the mixed boundary value indentation problems. For the two limiting cases of infinitely thick and infinitely thin piezoelectric films, closed-form solutions are obtained. For piezoelectric films of finite thickness, a numerical method is constructed to solve the dual integral equations and semi-empirical models having only two unknown parameters are proposed for the responses of indentation force, electric charge and electric potential, and contact radius. With the two parameters inferred from the numerical results, the semi-empirical formulae are found to provide good estimates of the indentation responses for the two limiting cases of infinitely thick and thin piezoelectric films, as well as those in between. The inferred parameters in the proposed semi-empirical formulae for normalized indentation force and electric charge are checked against four different piezoelectric materials and are found to be insensitive to the selection of piezoelectric materials. It is believed that the proposed semi-empirical indentation formulae are useful in developing experimental indentation techniques to extract the material properties of piezoelectric films
This work was submitted to JMPS and accepeted in Sep. 2008
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SO GREAT!
Hi Jianhui,
So...great to know there is another work in Prof.Chen group published in JMPS. You guys should celebrate it
Also would you mind posting the manuscript on imechanica? So everybody would be able to appreciate it
Kejie
Hi kejie thank you for
Hi kejie
thank you for your prize
The paper is now in press at http://www.sciencedirect.com/science?_ob=PublicationURL&_tockey=%23TOC%235586%239999%23999999999%2399999%23FLA%23&_cdi=5586&_pubType=J&_auth=y&_version=1&_urlVersion=0&_userid=1553478&md5=5b99a8cc96b15dee218d8e7d460b20a3
Click the url to download if you are interested.
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