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Study on the Fracture Toughness of 3D Printed Engineering Plastics

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Abstract

Using polylactic acid (PLA), polyamide (PA) and glass fiber–reinforced polyamide (GF/PA) as raw materials, samples with different printing temperature and speed were prepared. PLA samples were prepared by fused deposition modeling, and PA and PA/GF samples were prepared by selective laser sintering. The fracture toughness of 3D printed engineering plastics was characterized by three-point bending test. The results show that the process parameters have little effect on the fracture toughness of the specimen. With the change of printing temperature or speed, the fracture toughness of the specimen decreases by 4.9%. The raw materials have great influence on the fracture toughness of the specimens. The fracture toughness of PLA increases by 27.95% compared with PA and 58.71% with GF/PA. The results show that the fracture toughness of PLA is the highest among the three materials. Finally, the fracture surface of the specimen was scanned by scanning electron microscope, and the fracture microstructure was analyzed to reveal the influence of process parameters and raw materials on the fracture toughness of 3D printed engineering plastics.

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Acknowledgment

The authors are grateful for the financial support provided by the Six Talent Peaks Project in Jiangsu Province (Grant No. 2019-KTHY-059).

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Authors and Affiliations

  1. Beijing Institute of Aeronautical Materials, Aviation Engine Corporation of China, Beijing, 100095, China

    Yang Yang & Guangping Guo

  2. National Center for International Research on Structural Health management of Critical Components, Jiangsu University, Zhenjiang, 212013, Jiangsu, China

    Ye Liu

  3. College of Mechanical Engineering, Yangzhou University, Yangzhou, 225127, Jiangsu, China

    Wenfeng Hao & Xinwen Cheng

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  1. Yang Yang
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Correspondence to Wenfeng Hao.

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Yang, Y., Liu, Y., Hao, W. et al. Study on the Fracture Toughness of 3D Printed Engineering Plastics. J. of Materi Eng and Perform 31, 2889–2895 (2022). https://doi.org/10.1007/s11665-021-06439-z

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  • DOI: https://doi.org/10.1007/s11665-021-06439-z

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