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首页> 外文期刊>Journal of Applied Polymer Science >Structural and mechanical properties of needle-punched nonwoven reinforced composites in erosive environment
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Structural and mechanical properties of needle-punched nonwoven reinforced composites in erosive environment

机译：侵蚀环境下针刺非织造增强复合材料的结构和力学性能

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摘要

Polypropylene-based needle-punched nonwoven reinforced epoxy composites have been fabricated and were evaluated for their thermomechanical response and dry erosion performance. The erosive wear investigations were carried out using silica sand particles as erodent with varying impact velocity, angles of impingement, fiber content, and stand-off-distance as the operating variables. Design of experiments (DoE) approach-based Taguchi analysis was carried out to establish the interdependence of operating parameters and erosion rate. Impingement angle and impact velocity have been found to be the most significant determinants of erosive wear performance of such nonwoven reinforced composites. The composites were also observed to be appreciably resistant to impact content and indentations in addition to exhibiting the absence of any storage-modulus decay till 60°C accompanied with a nominal increase in the primary transition temperature as revealed from loss-tangent peaks. The composite with 30 wt % and 40 wt % of nonwoven materials have shown the highest and lowest erosion rates, respectively. The morphology of eroded surfaces was examined by using scanning electron microscopy (SEM) and their possible erosion mechanisms are discussed.
机译：聚丙烯基针刺非织造增强环氧复合材料已经制造出来，并对其热机械响应和干蚀性能进行了评估。侵蚀磨损的研究是使用硅砂颗粒作为侵蚀物，以不同的冲击速度，撞击角度，纤维含量和对峙距离作为操作变量进行的。进行了基于实验设计（DoE）方法的Taguchi分析，以建立运行参数和腐蚀速率的相互依存关系。已经发现，冲击角和冲击速度是此类非织造增强复合材料的侵蚀磨损性能的最重要决定因素。从损耗角正切峰可以看出，该复合材料除了在60°C之前没有任何储能模量衰减以及伴随着一次转变温度的名义升高外，还对冲击含量和压痕具有明显的抵抗力。具有30重量％和40重量％的非织造材料的复合材料分别显示出最高和最低的腐蚀速率。使用扫描电子显微镜（SEM）检查了腐蚀表面的形貌，并讨论了其可能的腐蚀机理。

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