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首页> 外文会议>CIRP Conference on Composite Materials Parts Manufacturing >A comparative study of the effects of milling and abrasive water jet cutting on flexural performance of CFRP
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A comparative study of the effects of milling and abrasive water jet cutting on flexural performance of CFRP

机译：铣削和磨料水射流切割对CFRP弯曲性能影响的对比研究

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Machining of carbon fibre reinforced polymers is part of the production process that introduces several challenges due to inherent characteristics of CFRPs such as non-homogeneity of their mechanical properties. A comparative analysis of conventional milling and abrasive water jet (AWJ) cutting is performed to quantify the effects of machining induced damage on flexural strength of woven CFRP laminates. The machined surfaces quality is characterized using optical and scanning electron microscopy methods prior to flexural mechanical testing. High-speed Digital Image Correlation technique is also used to measure deformation evolutions and determine fracture mechanisms in relation to the applied machining operation and produced machined surfaces. The effect of machining induced damage on strength of milled samples was less than expected with the AWJ processed samples having the least mechanical properties. The surface morphology analysis revealed that the entry and exit point of the water jet introduced severe surface and subsurface damage across the full thickness. The failure initiation sites were determined by strain distribution maps indicating that machining induced damage promotes failure of the tested CFRPs away from maximum compressive stress observed under the loading points.
机译：碳纤维增强聚合物的加工是生产过程的一部分，其引起了由于CFRP的固有特性，例如其机械性能的非均匀性的若干挑战。进行常规铣削和磨料水射流（AWJ）切割的对比分析，以量化加工诱导损伤对编织CFRP层压板弯曲强度的影响。机加工表面质量的特征在于在弯曲机械测试之前使用光学和扫描电子显微镜方法。高速数字图像相关技术还用于测量变形演进，并确定相对于施加的加工操作和生产加工表面的断裂机构。对于具有最小机械性能的AWJ加工样品，加工诱导损伤对研磨样品强度的影响小于预期。表面形态学分析表明，水射流的进出点引入了全厚度的严重表面和地下损伤。通过应变分布图确定失败启动位点，表明加工诱导的损伤促进测试的CFRPS远离负载点下观察到的最大压缩应力的损失。

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