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首页> 外文期刊>Journal of Composite Materials >Experimental investigation on impact, sound, and vibration response of natural-based composite sandwich made of flax and agglomerated cork
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Experimental investigation on impact, sound, and vibration response of natural-based composite sandwich made of flax and agglomerated cork

机译：亚麻自然复合夹层的冲击，声音和振动响应的实验研究

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摘要

In recent years, material scientists have been focusing on the utilization of materials from natural resources due to environmental concerns. In the same context, the aim of this work is to evaluate impact response, sound absorption behavior, and vibration damping characteristics of natural-based composite sandwich made of flax as skin reinforcement and agglomerated cork as core. Vacuum bagging method was used for manufacturing composite sandwiches with different cork densities of 240, 280, and 340 kg/m(3). Composite sandwiches have also been manufactured by using glass as skin reinforcement for comparison. Low velocity impact test was conducted and found that glass fiber reinforced composite sandwich required 73-77% more energy to perforate when compared to the flax fiber reinforced composite sandwich irrespective of core density. Flax fiber reinforced composite sandwich has 45-96% higher sound absorption capacity and 27-32% higher vibration damping ratio than glass fiber reinforced composite sandwich irrespective of core density. This is due to multiscale structure and cellular nature of the flax fiber and the cork materials, respectively. These enhancements in sound and vibration are accomplished with just little forfeits in perforation energy. This study recommends that, if optimized, the natural-based composite sandwich could be an ecologically appealing answer for automobile and construction applications, where impact behavior is important, along with sound and vibration properties.
机译：近年来，由于环境问题，材料科学家一直专注于利用自然资源的材料。在同一背景下，这项工作的目的是评估由亚麻自然复合夹层的影响响应，吸音行为和减振特性作为皮肤加固和凝聚的软木作为核心。真空装袋方法用于制造具有240,280和340kg / m（3）的不同软木密度的复合夹层。还通过使用玻璃作为皮肤增强来制造复合三明治以进行比较。对低速冲击试验进行了，发现与亚麻纤维增强复合材料夹层相比，玻璃纤维增​​强复合夹层需要73-77％的能量，而不管核心密度如何。无论核心密度如何，亚麻纤维增强复合夹层的吸收能力高45-96％，吸收容量高出27-32％较高的振动阻尼比玻璃纤维增​​强复合夹层。这是由于亚麻纤维和软木材料的多尺度结构和细胞性质。在穿孔能量中没有少于不适当地完成声音和振动的这些增强。本研究建议，如果优化，基于自然的复合三明治可能是汽车和施工应用的生态吸引力答案，其中影响行为很重要，以及声音和振动性能。

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