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Finite element analysis of the influence of interphase on the thermal residual stress level and distribution of SiCp/6061Al composites
Composite Interfaces ( IF 2.6 ) Pub Date : 2020-11-18 , DOI: 10.1080/09276440.2020.1846114
Qingping Wang 1 , Zhiqiang Zhu 1 , Pakeeza Maryum 1 , Yuxin Liu 1 , Tingting Xue 1 , Chunyang Lu 1 , Biao Hu 1 , Chao Zhang 1 , Ruxiang Qin 2
Affiliation  

ABSTRACT

The influence of interphase on the level and distribution of thermal residual stress (TRS) in SiCp/6061Al composites was studied by using a three-dimensional (3D) interface-phase model. The thermal expansion coefficient and elastic modulus of interphase components were the main factors affecting the TRS level in SiCp/6061Al composites. The formed SiC-MgO-6061Al interphase has highly concentrated TRS, and the formed SiC-Si-6061Al interphase had the lowest TRS level. With the increase of interphase thickness, for most interphase components, the TRS in SiCp/6061Al composites showed a trend of first decreased and then increased. When the interphase thickness was 1.2 μm, it had the lowest TRS level. When the SiC particle aspect ratio was large, the TRS was mainly concentrated in the sharp corner region jointly formed by the reinforcement and interphase. As the SiC particle aspect ratio decreased, the sharp corners of interphase become passivated, the level of TRS in the reinforcement and interphase of SiCp/6061Al composites also gradually decreased. The research results were based on the 3D interface-phase model and generally consistent with the actual experimental analysis.



中文翻译:

界面相对SiCp/6061Al复合材料热残余应力水平及分布影响的有限元分析

摘要

通过使用三维 (3D) 界面相模型研究了界面对 SiCp/6061Al 复合材料中热残余应力 (TRS) 水平和分布的影响。界面组分的热膨胀系数和弹性模量是影响 SiCp/6061Al 复合材料 TRS 水平的主要因素。形成的 SiC-MgO-6061Al 中间相具有高度集中的 TRS,形成的 SiC-Si-6061Al 中间相具有最低的 TRS 水平。随着界面厚度的增加,对于大部分界面成分,SiCp/6061Al复合材料的TRS呈现先下降后上升的趋势。当界面厚度为 1.2 μm 时,其 TRS 水平最低。当SiC颗粒纵横比较大时,TRS主要集中在由增强体和界面相共同形成的尖角区域。随着SiC颗粒纵横比的降低,界面尖角钝化,SiCp/6061Al复合材料增强层和界面中的TRS水平也逐渐降低。研究结果基于3D界面相模型,与实际实验分析基本一致。

更新日期:2020-11-18
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