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首页> 外文期刊>Composite Structures >Drilling induced defects on carbon fiber-reinforced thermoplastic polyamide and their effect on mechanical properties
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Drilling induced defects on carbon fiber-reinforced thermoplastic polyamide and their effect on mechanical properties

机译：钻探碳纤维增强热塑性聚酰胺的缺陷及其对机械性能的影响

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摘要

In this study, a carbon fiber-reinforced thermoplastic (CFRTP) laminate has been drilled and the drill-hole quality was evaluated. Drill-holes were introduced into the laminate by two 5.9 mm diameter step drills to simulate low and high quality machining processes. Defects from manufacturing of the laminate as well as resulting from the machining process were identified and classified by different imaging techniques on representative images. It became obvious, that burr formation is the dominant but not exclusive type of damage in drilled CFRTP in contrast to delamination in case of CFRP. Subsequently, 4-point-flexure and tensile tests have been performed with initial and differently drilled samples to characterize the starting material as well as to determine the influence of the different drill-hole qualities on the mechanical performance and failure behavior. These tests showed that there is no critical influence of the drill-hole quality on the open-hole tensile and flexure strength of the applied CFRTP.
机译：在该研究中，已经钻出了碳纤维增强热塑性塑料（CFRTP）层压板，并评估了钻孔质量。将钻孔引入层压板中，通过两个5.9毫米直径的步进钻头，以模拟低质量和高质量的加工过程。通过对代表性图像的不同成像技术鉴定和分类了层压材料的缺陷以及由加工过程鉴定和分类。显而易见的是，与CFRP的分层相比，毛刺形成是钻孔CFRTP中的主导但不是独占损伤的占主导地位但不是专用类型的损伤。随后，已经用初始和不同钻孔的样品进行了4点挠曲和拉伸试验，以表征起始材料以及确定不同钻孔质量对机械性能和故障行为的影响。这些测试表明，钻孔质量对所施加的CFRTP的开孔拉伸和弯曲强度没有关键影响。

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