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首页> 外文期刊>Journal of Manufacturing Processes >Fiber orientation angle effects in machining of unidirectional CFRP laminated composites
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Fiber orientation angle effects in machining of unidirectional CFRP laminated composites

机译：纤维取向角对单向CFRP层压复合材料加工的影响

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摘要

Experiments were carried out at the National Institute of Standards and Technology, in collaboration with The Boeing Company, to obtain force and temperature data as a function of feed, speed, and fiber orientation angle (FOA), for validation of finite element simulations of composite machining. The outer diameter portions of disks of unidirectional carbon fiber reinforced plastic (CFRP) laminates were cut orthogonally. Tabs were machined into the outer diameter (OD) to cause cutting to begin at a FOA of 0° and end at a FOA of 90°. Cutting forces were measured using a dynamometer and the chip morphology was recorded using a high speed camera. It was observed that the variation of cutting force with FOA depended on the feed. For large feed, the cutting force increases with FOA until an angle of 90°, whereas for low feed the cutting force decreases beyond 65°. The chip morphology also changes with FOA and feed. Significant tool flank wear is noted even in these short duration experiments, which causes the thrust and cutting forces to increase significantly for FOA from 0° to 60°. For 65°-80° FOA, force signals change cyclically. A small spike in the cutting force seems to be correlated with fibers being pulled out in clumps, and is followed by lower forces in subsequent revolutions while the pitted surface is machined.
机译：与波音公司合作，在美国国家标准技术研究院进行了实验，以获取力，温度数据作为进料，速度和纤维取向角（FOA）的函数，以验证复合材料的有限元模拟加工。正交切割单向碳纤维增强塑料（CFRP）层压板的圆盘的外径部分。将凸片加工到外径（OD）中，以使切割从0°的FOA开始，到90°的FOA结束。使用测力计测量切削力，并使用高速相机记录切屑形态。观察到切削力随FOA的变化取决于进料。对于大进给，切削力随FOA的增加而增加，直到90°的角度；而对于低进给，切削力则下降到65°以上。芯片形态也随FOA和进料而变化。即使在这些短期实验中，刀具侧面磨损也很明显，这导致FOA的推力和切削力从0°显着增加到60°。对于65°-80°FOA，力信号会周期性变化。切削力的小峰值似乎与纤维成团被拉出有关，随后在加工凹坑表面时，在随后的转数中施加较小的力。

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