Elastic constants of metal/ceramic composites with lamellar microstructures: Finite element modelling and ultrasonic experiments
Elastic constants of metal/ceramic composites with lamellar microstructures: Finite element modelling and ultrasonic experiments
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DOI：
10.1016/j.compscitech.2008.12.009
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发表时间：
2009-04
影响因子：
9.1
通讯作者：
T. Ziegler;A. Neubrand;Siddhartha Roy;A. Wanner;R. Piat
中科院分区：
文献类型：
--
作者：
T. Ziegler;A. Neubrand;Siddhartha Roy;A. Wanner;R. Piat
本文研究了由冷冻铸造坯体浸渗制备的层状AlSi_（12）/Al_2 O_3复合材料的单畴弹性性能。从超声相位谱（UPS）实验确定的各向异性弹性常数进行了比较，以微观结构为基础的FE-模型创建的程序OOF 2，微力学模型（Mori-Tanaka和逆Mori-Tanaka）和一个理想的层压板的分析模型。研究了层状取向和陶瓷含量对弹性常数的影响。在沿着层流方向，基于微观结构的有限元模型和Mori-Tanaka逆模型与实验结果吻合较好。与层板无关，实验表明其弹性行为比预期的更硬。
The elastic properties of single domains of lamellar AlSi12/Al2O3composites produced by metal infiltration of freeze cast preforms have been examined. The anisotropic elastic constants determined from ultrasonic phase spectroscopy (UPS) experiments have been compared to microstructure based FE-models created with the program OOF2, micromechanical models (Mori–Tanaka and inverse Mori–Tanaka) and an analytical model for an ideal laminate. The influences of lamellae orientations and ceramic contents on the elastic constants have been investigated. Along the lamellae directions the microstructure based FE model and the inverse Mori–Tanaka model are in good agreement with experimental results. Perpendicular to the lamellae the experiment shows a stiffer than expected elastic behaviour.