Tuning mechanical properties of 3D printed composites with PLA:TPU programmable filaments
Tuning mechanical properties of 3D printed composites with PLA:TPU programmable filaments
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使用 PLA:TPU 可编程长丝调整 3D 打印复合材料的机械性能
DOI：
10.1016/j.compstruct.2023.117075
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发表时间：
2023
影响因子：
6.3
通讯作者：
Muliana, Anastasia
中科院分区：
文献类型：
--
作者：
Darnal, Aryabhat;Shahid, Zaryab;Deshpande, Himani;Kim, Jeeeun;Muliana, Anastasia
聚乳酸（PLA）长丝由于其优异的机械性能，如高强度，被广泛用于桌面3D打印；然而，其脆性限制了其用于制造柔性物体。热塑性聚氨酯（TPU）长丝也广泛用于桌面3D打印，另一方面，它是柔性的，通常用于打印承载性能相对较低的柔性物体。本研究探讨了使用PLA和TPU长丝组成的可编程长丝（PLA和TPU的不同体积比）打印样品的机械性能调整能力。两种类型的PLA和TPU长丝的安排，即串联和并联，被考虑。PLA:TPU可编程长丝用于打印犬骨试件进行拉伸测试。在打印犬骨试样时，光栅角度是变化的，即相对于试样的横向0°、45°和90°。为了检查基于不同PLA和TPU长丝排列、成分和光栅角度的力学行为，对可编程长丝和狗骨样品进行了拉伸试验。本研究展示了在打印过程中通过设计可编程细丝和改变光栅角度来调整打印对象的机械性能的能力。
Polylactic acid (PLA) filament is widely used for desktop 3D printing purposes due to its exceptional mechanical properties such as high strength; however, its brittleness restricts its use for producing flexible objects. Thermoplastic polyurethane (TPU) filament which is also widely used for desktop 3D printing, on the other hand, is flexible and commonly used in printing compliant objects with relatively low load-bearing performance. This study investigates the ability to tune the mechanical properties of specimens that are printed using programmable filaments composed of PLA and TPU filaments with different volume ratios of PLA and TPU. Two types of PLA and TPU filament arrangements, i.e., series and parallel, are considered. The PLA:TPU programmable filaments are used to print dogbone specimens for tensile testing. In printing the dogbone specimens, the raster angle is varied, i.e., 0, 45, and 90° with respect to the transverse direction of the specimen. To examine their mechanical behaviors based on different PLA and TPU filament arrangements, compositions, and raster angles, tensile tests are conducted on both programmable filaments and dogbone specimens. This study demonstrates the ability to tune the mechanical properties of printed objects by designing programmable filaments and varying raster angles during printing.