机械加工
分层(地质)
航空航天
钻探
推力
材料科学
表面粗糙度
碳纤维增强聚合物
表面光洁度
机械工程
复合材料
地质学
工程类
冶金
航空航天工程
复合数
古生物学
俯冲
构造学
作者
Javier Martı́nez,P. Rodriguez Hernandez,Diego Carou
标识
DOI:10.1177/14644207231154079
摘要
The present research aims at studying both dry machining and alternative solutions to wet machining in the drilling of carbon fiber-reinforced polymers (CFRPs). CFRPs are key materials in aerospace and their drilling is critical and challenging. Specifically, cryogenic fluids such as CO 2 and N 2 were investigated. Drilling tests were performed using three different CFRP laminates. These CFRP laminates are composed of various unidirectional plies of different orientations. Thus, the configurations to analyze were: 0/90/45, 30/60 and 0/90. As output variables, surface roughness, diameter deviation, delamination and thrust forces were analyzed. In general, the internal application of CO 2 and dry machining were the best- and worst-performing techniques for surface roughness, respectively. Regarding the dimensional quality, both CO 2 and dry machining offered the best results. In the case of LN 2 or LN 2 + CO 2 , the results showed that the CFRP configuration is critical for the obtained results. However, it was identified that cryogenics can improve the results of the dry machining process under certain conditions in terms of delamination. Finally, in general, CO 2 provided the worst results when attending to the thrust forces.
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