Martín María Jesús, Auñón Juan Antonio, Martín Francisco
Department of Civil, Materials, and Manufacturing Engineering, University of Malaga, C/Dr. Ortiz Ramos s/n, 29071 Málaga, Spain.
Department of Mechanical, Thermal, and Fluids Engineering, University of Malaga, C/Dr. Ortiz Ramos s/n, 29071 Málaga, Spain.
Polymers (Basel). 2021 Aug 31;13(17):2934. doi: 10.3390/polym13172934.
This paper presents the results of a comparative evaluation of the tensile strength behaviors of parts obtained by additive manufacturing using fused filament fabrication (FFF) technology. The study investigated the influences of the deposition printing parameters for both polymers and fiber-reinforced polymers. Polymeric materials that are widely used in FFF were selected, including acrylonitrile butadiene styrene (ABS), polylactic acid (PLA), and nylon. Carbon and glass continuous fibers were used to reinforce the nylon matrix in composite materials. The study utilized two manufacturing methods. Polymers were manufactured using an Ultimaker 2 Extended+ device and the fiber-reinforced polymer specimens were obtained using a Markforged Mark Two printer. The entire set of specimens was eventually subjected to destructive monoaxial tensile tests to measure their responses. The main goal of this study was to estimate the effect of the different infill patterns applied (zig-zag, concentric, and four different orientations lines) on the mechanical properties of pure thermoplastic materials and reinforced polymers. Results show a spectacular increase in the tensile stress at break, which for polymers reaches an average value of 27.53 MPa compared to 94.51 MPa in the case of composites (increase of 70.87%). A similar increase occurs in the case of tensile stress at yield with values of 31.87 MPa and 105.98 MPa, respectively, which represents an increase of 69.93%. The influence of the infill of the fiber is decisive, reaching, in the 0-0 arrangement, mean values of 220.18 MPa for tensile stress at break and 198.26 MPa for tensile stress at yield.
本文介绍了使用熔丝制造（FFF）技术通过增材制造获得的零件拉伸强度行为的比较评估结果。该研究调查了聚合物和纤维增强聚合物的沉积印刷参数的影响。选择了在FFF中广泛使用的聚合物材料，包括丙烯腈丁二烯苯乙烯（ABS）、聚乳酸（PLA）和尼龙。碳和玻璃连续纤维用于增强复合材料中的尼龙基体。该研究采用了两种制造方法。聚合物使用Ultimaker 2 Extended+设备制造，纤维增强聚合物试样使用Markforged Mark Two打印机获得。最终对整个试样组进行了破坏性单轴拉伸试验，以测量它们的响应。本研究的主要目标是评估所应用的不同填充图案（之字形、同心和四种不同方向的线条）对纯热塑性材料和增强聚合物力学性能的影响。结果表明，断裂拉伸应力显著增加，聚合物的平均断裂拉伸应力为27.53 MPa，而复合材料的平均断裂拉伸应力为94.51 MPa（增加了70.87%）。屈服拉伸应力也有类似的增加，分别为31.87 MPa和105.98 MPa，增加了69.93%。纤维填充的影响是决定性的，在0-0排列中，断裂拉伸应力的平均值为220.18 MPa，屈服拉伸应力的平均值为198.26 MPa。
