Abstract

The present research investigated previously unexplored attributes of 3D printed continuous fiberglass reinforced Nylon composites, Drop-weight and pendulum (Charpy and Izod) impact resistance including their failure mechanisms with a view to assessing their suitability for prospective high-performance applications such as aerospace, automobile and building industries. The composites were printed with different cellular structures (triangular, hexagonal, rectangular and solid) and three distinct fiber orientations (0/0/0/0, 0/90/0/90 and 0/45/90/-45). Results of the impact assessment of the developed composites exhibited substantial performance when compared to traditional 3D orthogonal plain-woven composites indicating 3D printing process as a promising composite fabrication technology. The effect of fiber orientation was very dominant towards dictating mechanical properties; cross-lay samples (0/90/0/90) absorbed the highest Drop-weigh impact energy followed by quasi-isotropic (0/45/90/-45) and unidirectional (0/0/0/0) composites, while the highest pendulum impact energy was showed by unidirectional composites, followed by cross-lay and quasi-isotropic samples. Incorporation of cellular structure had some effect on the properties measured and composite weight reduction; however, relative contribution of different structures was confounding associating a lot of factors that warn further research.

摘要

本研究调查了3D打印连续玻璃纤维增​​强尼龙复合材料，下落重量和摆锤（夏比（Charpy）和艾佐德（Izod））的先前未探索的属性，包括其失效机理，以评估其对航空航天，汽车等预期高性能应用的适用性和建筑业。用不同的孔结构（三角形，六边形，矩形和实心）和三个不同的纤维方向（0/0/0 / 0、0 / 90/0/90和0/45/90 / -45）印刷复合材料。与传统的3D正交平纹复合材料相比，已开发复合材料的冲击评估结果显示出显着的性能，表明3D打印工艺是一种很有前途的复合材料制造技术。纤维取向的影响在决定机械性能方面非常占优势。横向样品（0/90/0/90）吸收了最大的Drop-Weigh冲击能量，其次是准各向同性（0/45/90 / -45）和单向（0/0/0/0）复合材料，而单向复合材料表现出最高的摆锤冲击能，其次是交叉铺层和准各向同性样品。细胞结构的掺入对所测得的性能和复合材料的重量减轻有一定影响。然而，不同结构的相对贡献使许多警告进一步研究的因素变得令人困惑。单摆复合材料表现出最高的摆锤冲击能，其次是交叉铺层和准各向同性样品。细胞结构的掺入对所测得的性能和复合材料的重量减轻有一定影响。然而，不同结构的相对贡献使许多警告进一步研究的因素变得令人困惑。单摆复合材料表现出最高的摆锤冲击能，其次是交叉铺层和准各向同性样品。细胞结构的掺入对所测得的性能和复合材料的重量减轻有一定影响。然而，不同结构的相对贡献使许多警告进一步研究的因素变得令人困惑。