News Column

Recent Research from Rutgers State University Highlight Findings in Mechanical Engineering

May 21, 2014



By a News Reporter-Staff News Editor at Journal of Engineering -- Researchers detail new data in Mechanical Engineering. According to news reporting originating in New Brunswick, New Jersey, by VerticalNews editors, the research stated, "Ferroelectric crystals represent a very unique class of multifunctional materials. In addition to strong electromechanical coupling, there exist ferroelectric domains, which can be switched through the application of an electric field or mechanical stress."

The news reporters obtained a quote from the research from Rutgers State University, "In addition, these crystals possess several distinct crystal structures over a wide temperature range. As such, phase transition can take place as the crystals are cooled down or heated up, without or with the additional effect of stress or electric field. Domain switch and phase transition represent the two fundamental processes that can affect their microstructures and electromechanical characteristics. In this lecture, we highlight the applications of micromechanics to bulk ferroelectrics and phase fields to nano-structures. The starting points of micromechanics are crystal structures and the Eshelby mechanics, whereas those of the phase fields are the time-dependent Ginzburg-Landau kinetic equation and the Landau-Ginzburg-Devonshire energy density function."

According to the news reporters, the research concluded: "We explain how micromechanics can have wide applicability in the study of domain switch and phase transition, and change of dielectric constants, of bulk BaTiO3 crystals, and how phase fields can provide the nano-scale domain patterns, influence of surface tension on free-standing BaTiO3 nano-thin films, and grain-size dependence of ferroelectric characteristics in nano-grained BaTiO3 polycrystals."

For more information on this research see: The Prager Medal Lecture: micromechanics and some aspects of phase fields in ferroelectric crystals. Acta Mechanica, 2014;225(4-5):979-998. Acta Mechanica can be contacted at: Springer Wien, Sachsenplatz 4-6, PO Box 89, A-1201 Wien, Austria. (Springer - www.springer.com; Acta Mechanica - www.springerlink.com/content/0001-5970/)

Our news correspondents report that additional information may be obtained by contacting G.J. Weng, Rutgers State University, Dept. of Mech & Aerosp Engn, New Brunswick, NJ 08903, United States.

Keywords for this news article include: New Jersey, New Brunswick, United States, Mechanical Engineering, North and Central America

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Journal of Engineering


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