Modelling and experimental validation on drilling delamination of aramid fiber reinforced plastic composites
Modelling and experimental validation on drilling delamination of aramid fiber reinforced plastic composites
复制标题
芳纶纤维增强塑料复合材料钻孔分层建模与实验验证
DOI：
10.1016/j.compstruct.2020.111907
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发表时间：
2020-03-15
影响因子：
6.3
通讯作者：
Shen, Yifei
中科院分区：
文献类型：
--
作者：
Liu, Sinan;Yang, Tao;Shen, Yifei
芳纶纤维增强塑料（AFRP）复合材料已广泛应用于航空航天、军事和汽车工业。AFRP制造中常见的钻孔工艺会引起分层，严重影响钻孔后AFRP构件的力学性能和疲劳寿命，因此，建立精确的分层模型对于分层抑制和孔质量优化是非常必要的。然而，现有的脱层模型，横刃和翻边的所有载荷作用在横刃下的未切割层的代数总结，这并不代表真正的接触条件。在这项研究中，提出了一个新的分层制度，分层所造成的推力所施加的横刃和切削唇已被认为是。在此基础上，提出了一种新的分析模型的背景下AFRP钻临界推力（CTF）的预测。双悬臂梁（DCB）和脱层试验验证了该模型的有效性，结果表明，该模型与实验结果吻合较好，其中横刃产生的推力占AFRP钻孔过程中总载荷的24%。
Aramid fiber reinforced plastic (AFRP) composites have been widely used in aerospace, military, and automotive industries. The common drilling process deployed for AFRP manufacturing can induce delamination that drastically deteriorate the mechanical performance and fatigue lives of the drilled AFRP components, therefore, establishing an accurate delamination model is desirable for delamination suppression and hole quality optimization. However, existing delamination models sum up all loads of the chisel edge and cuffing lips act on the uncut plies under the chisel edge algebraically, which does not represent the true contact conditions. In this study, a new delamination regime is proposed where delamination caused by thrust forces exerted by both the chisel edge and cutting lips have been considered. On this basis, a novel analytical model in the context of AFRP drilling is proposed for the critical thrust force (CTF) prediction. Double cantilever beam (DCB) and delamination tests have been performed to validate the new model and results show that our proposed model agrees highly with the experimental results where the thrust force exerted by the chisel edge accounts for 24% of the total load during drilling of AFRP.