This paper aims to focus on investigating the failure mode of fused deposition modeling (FDM) fabricated parts by using acoustic emission (AE) technique.,Considering the special prototyping way of FDM, the failure modes of FDM-fabricated parts were investigated experimentally. One test was carried out and the other two describe what has been observed on this basis. Acoustic emissions are obtained during the tensile process. AE features of peak frequency, energy and amplitude are extracted and preliminarily analyzed. Then, the unsupervised clustering method of k-means is applied to explore the relationship between the failure modes and the AE signals.,Failure modes of filament debonding and breakage can be successfully recognized by the pattern recognition technique of k-means.,The results obtained can help us understand the failure process of FDM printed parts. This will provide an available monitoring method in the application of FDM-fabricated parts.,This paper has investigated and characterized the failure modes of FDM fabricated parts for the first time.

中文翻译：

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使用声发射通过熔融沉积建模制造的 PLA 零件的失效表征

本文旨在重点研究采用声发射(AE)技术的熔融沉积建模(FDM)制造零件的失效模式。考虑到FDM特殊的原型制作方式,对FDM制造零件的失效模式进行了实验研究。进行了一项测试，另外两项则描述了在此基础上观察到的情况。在拉伸过程中获得声发射。提取并初步分析峰值频率、能量和幅度的声发射特征。然后，应用k-means的无监督聚类方法探索失效模式与AE信号之间的关系。,通过k-means的模式识别技术可以成功识别灯丝脱粘和断裂的失效模式，得到的结果可以帮助我们了解 FDM 打印零件的失效过程。这将为FDM制造零件的应用提供一种可用的监测方法。,本文首次对FDM制造零件的失效模式进行了研究和表征。