ABSTRACT

The transport and construction industries are increasingly interested in natural fiber composites (NFCs) for the production of some of their structural elements. NFCs have significant advantages over synthetic fiber-based composites: lightweight, mechanical resistance, thermal and acoustic insulation. In addition, natural fibers are renewable and biodegradable, a significant advantage over synthetic and petrochemical-based fibers. In this study, honeycomb cores made from non-woven flax-epoxy composites are investigated. The experimental characterization focuses on their compressive response. Three different core densities are used: 100 g/m2, 150 g/m2 and 200 g/m2. In addition to the compressive behavior, honeycomb core damage was monitored using acoustic emission (AE). The K-means method was used to classify acoustic events and to identify damage mechanisms.

摘要

运输和建筑行业对用于生产某些结构元件的天然纤维复合材料 (NFC) 越来越感兴趣。与基于合成纤维的复合材料相比，NFC 具有显着优势：重量轻、耐机械性、隔热和隔音。此外，天然纤维是可再生和可生物降解的，与合成纤维和石化纤维相比具有显着优势。在这项研究中，研究了由非织造亚麻环氧树脂复合材料制成的蜂窝芯。实验表征侧重于它们的压缩响应。使用了三种不同的芯密度：100 g/m2、150 g/m2 和 200 g/m2。除了压缩行为外，还使用声发射 (AE) 监测蜂窝芯损坏。