Modelling of multilayer actuator layers by homogenisation technique using Digimat software

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• 作者：Tomasz Trzepieciński^a ; ^{tomtrz@prz.edu.pl} ; Grażyna Ryzińska^a ; Mojtaba Biglar^a ; Magdalena Gromada^b
• 关键词：Barium titanate ; Ceramic ; Digimat ; Homogenisation ; Microstructure
• 刊名：Ceramics International
• 出版年：2017
• 出版时间：15 February 2017
• 年：2017
• 卷：43
• 期：3
• 页码：3259-3266
• 全文大小：2309 K
• 卷排序：43

文摘

This paper is concerned with the microstructure of adhesive joints composed of BaTiO3 ceramic material and two kinds of adhesives, with a special emphasis on the numerical modelling of grain size, shape and material porosity. BaTiO3 powder for use in stacked-disk multilayer actuator production is manufactured using the solid-state technique. The properties of BaTiO3 material at each stage of its fabrication that influence its application for the stacked-disk multilayer actuator are presented and discussed. The parameters characterising the properties of the fabricated pellets are also described. Implicit time-discretisation and consistent tangent operators are employed. A 3D microstructure model of BaTiO3 using Digimat-FE software is generated. Then, effective elastic constants of BaTiO3 and epoxy adhesive composites are calculated by numerical simulation. The Mori-Tanaka homogenisation scheme for representative volume elements of BaTiO3 and epoxy adhesives composites is carried out using Digimat-MF software in order to obtain failure characteristics of the composite material.