Influence of fiber length on the tensile behavior of fiber metal laminates with discontinuous reinforcement
Influence of fiber length on the tensile behavior of fiber metal laminates with discontinuous reinforcement
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DOI：
10.1177/0731684415594890
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发表时间：
2015-07
影响因子：
3.1
通讯作者：
J. Xue;Wen-Xue Wang;Junfeng Hu;Jiazhen Zhang;Sujun Wu
中科院分区：
文献类型：
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作者：
J. Xue;Wen-Xue Wang;Junfeng Hu;Jiazhen Zhang;Sujun Wu
本文通过有限元分析和实验研究了纤维长度对单向排列短切原丝/铝板复合材料层合板拉伸性能的影响。单向排列的短切原丝层片是通过在碳纤维增强塑料预浸料中引入狭缝而制成的，其中连续纤维单向排列。纤维长度是定制单向排列的短切原丝/铝层压板以实现特定应用所需的力学行为的最基本因素之一。纤维长度越长，复合材料的力学性能越好;纤维长度越短，复合材料的成形性能越好。建立了单向排列短切原丝/铝层合板的二维有限元模型，在单向排列短切原丝/铝层合板的各界面分别插入层内粘结区单元和层间粘结区单元，对不同纤维长度的单向排列短切原丝/铝层合板进行了拉伸分析。实验结果验证了典型数值模拟结果的正确性，证实了本文提出的数值模拟方法可以很好地预测不同纤维长度的单向短切原丝/铝合金层合板的拉伸行为。
In this paper, the influence of fiber length on the tensile behavior of fiber metal laminate, which is fabricated with unidirectionally arrayed chopped strand plies and aluminum sheets and named as unidirectionally arrayed chopped strand/aluminum laminate, was investigated based on finite element analysis and experiment. The unidirectionally arrayed chopped strand ply is made by introducing slits into carbon fiber reinforced plastic prepreg where continuous fibers are arrayed unidirectionally. The fiber length is one of the most fundamental factors in tailoring the unidirectionally arrayed chopped strand/aluminum laminate to achieve the desired mechanic behaviors for specific applications. With longer fiber length, the mechanical behaviors of the bulk laminate should be more favorable, while the formability would be better with short fiber. Two-dimensional finite element models, with intra-laminar cohesive zone elements inserted into the slits of unidirectionally arrayed chopped strand plies and inter-laminar cohesive zone elements inserted into the all interfaces of unidirectionally arrayed chopped strand/aluminum laminate, respectively, were developed for the analysis of unidirectionally arrayed chopped strand/aluminum laminates with different fiber lengths under tension. Typical numerical results were validated by experimental results, which confirm that the tensile behaviors of the unidirectionally arrayed chopped strand/aluminum laminates with various different fiber lengths can be well predicted by present numerical modeling method.