Multiscale homogenization models for the elastic behaviour of metal/ceramic composites with lamellar domains
Multiscale homogenization models for the elastic behaviour of metal/ceramic composites with lamellar domains
复制标题
层状域金属/陶瓷复合材料弹性行为的多尺度均质化模型
DOI：
10.1016/j.compscitech.2009.12.022
复制
发表时间：
2010
影响因子：
9.1
通讯作者：
R. Piat
中科院分区：
文献类型：
--
作者：
T. Ziegler;A. Neubrand;R. Piat
本研究预测了一种创新的金属-陶瓷复合材料的弹性性能，该复合材料具有嵌入共晶Al-Si合金中的平行陶瓷片的统计取向域。为此，采用有限元和微观力学建模的两步均匀化程序。在第一步中，试样的微观结构被划分为具有相同取向的层状结构的域，并计算单个域的弹性性能，同时尝试精确表示层状结构的形状。在第二步中，由许多域组成的大型试样的弹性常数计算有限元和微观力学建模。这种多域试样的实验杨氏模量由声共振法测定，并低于预测。这些差异可以用这些材料从制造温度冷却时产生的大的残余微应力引起的微裂纹来解释。
This study predicts the elastic properties of an innovative metal–ceramic composite with statistically oriented domains of parallel ceramic platelets embedded in a eutectic Al–Si-alloy. For this purpose, a two-step homogenization procedure was employed by finite element- and micromechanical modelling. In a first step, the microstructure of the specimen was divided in domains with the same orientation of lamellae and the elastic properties of single domains were calculated while a precise representation of the shape of the lamellae was attempted. In a second step the elastic constants of a large specimen consisting of many domains were computed both by finite element and micromechanical modelling. The experimental Young’s modulus of such poly-domain specimens was determined by an acoustic resonance method and was lower than predicted. The differences can be explained by microcracks caused by large residual microstresses produced in these materials when they are cooled from the manufacturing temperature.
影响因子：
9.1
作者：
T. Ziegler;A. Neubrand;Siddhartha Roy;A. Wanner;R. Piat
通讯作者：
T. Ziegler;A. Neubrand;Siddhartha Roy;A. Wanner;R. Piat
DOI：
10.1016/j.ijsolstr.2008.08.010
发表时间：
2009-05-15
影响因子：
3.6
作者：
Genin, Guy M.;Birman, Victor
通讯作者：
Birman, Victor