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Article

Toward a Better Understanding of Shock Imprinting with Polymer Molds Using a Combination of Numerical Analysis and Experimental Research

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Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto-shi 860-8555, Kumamoto, Japan
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Institute of Industrial Nanomaterials (IINa), Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto-shi 860-8555, Kumamoto, Japan
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Faculty of Mechanical Engineering and Technologies, Novosibirsk State Technical University, K. Marks 20, 630073 Novosibirsk, Russia
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Technical Division, Faculty of Engineering, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto-shi 860-8555, Kumamoto, Japan
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Department of Mechanical and Intelligent Systems Engineering, National Institute of Technology (KOSEN), Kumamoto College, 2627 Hirayama-Shinmachi, Yatsushiro-shi 866-8501, Kumamoto, Japan
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Authors to whom correspondence should be addressed.
Academic Editor: Alexander V. Baranov
Materials 2022, 15(5), 1727; https://doi.org/10.3390/ma15051727
Received: 27 December 2021 / Revised: 7 February 2022 / Accepted: 21 February 2022 / Published: 25 February 2022
In the last decade, a new technique has been developed for the nanoimprinting of thin-metal foils using laser-induced shock waves. Recent studies have proposed replacing metal or silicone molds with inexpensive polymer molds for nanoimprinting. In addition, explosive-derived shock waves provide deeper imprinting than molds, greatly simplifying the application of this technology for mass production. In this study, we focused on explosive-derived shock waves, which persist longer than laser-induced shock waves. A numerical analysis and a set of simplified molding experiments were conducted to identify the cause of the deep imprint. Our numerical analysis has accurately simulated the pressure history and deformation behavior of the workpiece and the mold. Whereas a high pressure immediately deforms the polymer mold, a sustained pressure gradually increases the molding depth of the workpiece. Therefore, the duration of the pressure can be one of the conditions to control the impact imprint phenomenon. View Full-Text
Keywords: nanoimprinting; laser shock imprinting; high strain rate; polycarbonate; Autodyn nanoimprinting; laser shock imprinting; high strain rate; polycarbonate; Autodyn
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MDPI and ACS Style

Hasegawa, K.; Tanaka, S.; Bataev, I.; Inao, D.; Nishi, M.; Kubota, A.; Hokamoto, K. Toward a Better Understanding of Shock Imprinting with Polymer Molds Using a Combination of Numerical Analysis and Experimental Research. Materials 2022, 15, 1727. https://doi.org/10.3390/ma15051727

AMA Style

Hasegawa K, Tanaka S, Bataev I, Inao D, Nishi M, Kubota A, Hokamoto K. Toward a Better Understanding of Shock Imprinting with Polymer Molds Using a Combination of Numerical Analysis and Experimental Research. Materials. 2022; 15(5):1727. https://doi.org/10.3390/ma15051727

Chicago/Turabian Style

Hasegawa, Kouki, Shigeru Tanaka, Ivan Bataev, Daisuke Inao, Matatoshi Nishi, Akihisa Kubota, and Kazuyuki Hokamoto. 2022. "Toward a Better Understanding of Shock Imprinting with Polymer Molds Using a Combination of Numerical Analysis and Experimental Research" Materials 15, no. 5: 1727. https://doi.org/10.3390/ma15051727

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