Singh Rupinder, Kumar Ranvijay, Farina Ilenia, Colangelo Francesco, Feo Luciano, Fraternali Fernando
Department of Production Engineering, Guru Nanak Dev Engineering College, Ludhiana 141006, India.
Department of Engineering, University of Naples Parthenope, 80143 Naples, Italy.
Polymers (Basel). 2019 Jan 4;11(1):62. doi: 10.3390/polym11010062.
This paper highlights the multi-material additive manufacturing (AM) route for manufacturing of innovative materials and structures. Three different recycled thermoplastics, namely acrylonitrile butadiene styrene (ABS), polylactic acid (PLA), and high impact polystyrene (HIPS) (with different Young's modulus, glass transition temperature, rheological properties), have been selected (as a case study) for multi-material AM. The functional prototypes have been printed on fused deposition modelling (FDM) setup as tensile specimens (as per ASTM D638 type-IV standard) with different combinations of top, middle, and bottom layers (of ABS/PLA/HIPS), at different printing speed and infill percentage density. The specimens were subjected to thermal (glass transition temperature and heat capacity) and mechanical testing (peak load, peak strength, peak elongation, percentage elongation at peak, and Young's modulus) to ascertain their suitability in load-bearing structures, and the fabrication of functional prototypes of mechanical meta-materials. The results have been supported by photomicrographs to observe the microstructure of the analyzed multi-materials.
本文重点介绍了用于制造创新材料和结构的多材料增材制造（AM）路线。已选择三种不同的回收热塑性塑料，即丙烯腈丁二烯苯乙烯（ABS）、聚乳酸（PLA）和高抗冲聚苯乙烯（HIPS）（具有不同的杨氏模量、玻璃化转变温度、流变特性）作为多材料增材制造的案例研究对象。功能性原型已在熔融沉积建模（FDM）设备上打印成拉伸试样（按照ASTM D638-IV型标准），其顶层、中层和底层（由ABS/PLA/HIPS制成）具有不同组合，并采用不同的打印速度和填充百分比密度。对试样进行了热性能测试（玻璃化转变温度和热容量）和力学测试（峰值载荷、峰值强度、峰值伸长率、峰值伸长百分比和杨氏模量），以确定它们在承载结构中的适用性，以及制造机械超材料的功能性原型。通过显微照片对分析的多材料微观结构进行观察，为研究结果提供了支持。
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