Quantitative characterization of the fiber orientation variation in the Csf/Mg composites

Quantitative characterization of the fiber orientation variation in the Csf/Mg composites
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Csf/Mg 复合材料中纤维取向变化的定量表征

DOI:
10.1016/j.commatsci.2014.10.058
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发表时间:
2015-02
影响因子:
3.3
通讯作者:
Zhou, Jiming
Zhou, Jiming
中科院分区:
材料科学3区
文献类型:
--
作者:
Tian, Wenlong;Qi, Lehua;Zhou, Jiming

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基于主应变驱动的纤维取向演化机制,提出了以主应变为函数的纤维取向变化因子V来定量表征挤压后Csf/Mg复合材料中纤维取向角的变化。采用有限元方法对Csf/Mg复合材料的挤压成形过程进行了数值模拟。将有限元模拟预测的纤维取向变化因子与Csf/Mg复合材料挤压实验显微照片测量的结果进行了比较。结果表明,有限元模拟所得的纤维取向变化因子V与挤压实验所得的纤维取向变化因子V吻合较好,表明纤维取向变化因子V是有效的,可以方便地表征挤压后Csf/Mg复合材料的纤维取向变化。纤维取向变化因子的分布表明,挤压后的Csf/Mg复合材料中的纤维向最大主应变方向重新取向,偏离中主应变和最小主应变方向。
Based on the principal strain driven fiber orientation evolution mechanism, the fiber orientation variation factor V, which is a function of the principal strains, is proposed to quantitatively characterize the variation of fiber orientation angles in the extruded Csf/Mg composites. The FE analyses are implemented to numerically simulate the extrusion forming process of Csf/Mg composites. The fiber orientation variation factors predicted by the FE simulations are compared against those measured from the micrographs of the extrusion experiments of Csf/Mg composites. The results show that the fiber orientation variation factor V of the FE simulations and of the extrusion experiments match well such that the fiber orientation variation factor V is valid and convenient to characterize the fiber orientation variation in the extruded Csf/Mg composites. The distribution of the fiber orientation variation factors illustrates that the fibers in the extruded Csf/Mg composites are reoriented towards the direction of the maximum principal strain, and deviated from the directions of the medium and minimum principal strains.
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