Abstract
3D printing is a manufacturing process to create three-dimensional objects directly from a computer designed model. The 3D-printed objects are fabricated by the gradual addition of point-wise, line-wise, or layer-wise material elements, making it also known as “additive manufacturing” [1]. Additive manufacturing technology was developed decades ago with Chuck Hull's invention of stereolithography in the 1980s. Due to its availability to improved performance, complex geometries, and simplified fabrication, additive manufacturing is now actively embraced by a variety of industrial sectors, e.g., automotive, aerospace, medical and dental care, education, art, culture, and so on. China has given great attention to the 3D printing technology. The Ministry of Industry and Information Technology and the National Development and Reform Commission have successively issued policy documents (in 2015, 2017, and 2020) to support the research and development of 3D printing. Moreover, 3D printing is also highlighted in the “Made in China 2025” program.
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