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Crack Guidance Utilizing the Orientation of Additive Manufactured Lattice Structure

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Abstract

We propose a method to guide the direction of cracks by utilizing the orientation of Ti-6Al-4V lattice structures produced by powder bed fusion, which has recently attracted considerable attention in additive manufacturing. The fracture characteristics and impact strengths were observed by inserting a diagonal structure with structural anisotropy into specimens of various directions and densities, and it was confirmed that the impact strength differed depending on the differences between the direction of the z-strut, impact direction, and density of the lattice structure. Using this, crack guidance specimens with optimal lattice structures were manufactured along the direction of the cracks, and it was confirmed that cracks were uniformly induced in comparison to single lattice crack guidance specimens. This crack guidance is expected to be used in future machinery in various industries for the protection of important components and shock mitigation in the event of a sudden impact.

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Acknowledgements

This study was supported by the Technology Innovation Program funded by the Ministry of Trade, Industry & Energy(MOTIE) of Korea (20010917, Development of automotive parts to improve driving performance and passenger convenience using DfAM-based 3D printing manufacturing technology) and the KITECH internal project (EO210005, Development of a holonic manufacturing system for future industrial environments).

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Authors and Affiliations

  1. Advanced Joining and Additive Manufacturing R&D Department, Korea Institute of Industrial Technology, 113-58 Seohaean-ro, Siheung, Gyeonggi-do, 15014, Republic of Korea

    Jun Hak Lee, Seong Je Park, Jeongho Yang, Si Mo Yeon, Yong Son & Jiyong Park

  2. Optical Nanoprocessing Lab, Department of Mechanical Engineering, Hanyang University, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan, Gyeonggi-do, 15588, Republic of Korea

    Jun Hak Lee, Seong Je Park & Sukjoon Hong

  3. School of Mechanical Engineering, Pusan National University, 2 Busandaehak-ro 63 beon-gil, Busan, 46241, Republic of Korea

    Jeongho Yang

  4. Department of Convergence Manufacturing System Engineering, University of Science and Technology (UST), 217 Gajeong-ro, Yuseong-gu, Daejeon, 34113, Republic of Korea

    Jiyong Park

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  1. Jun Hak Lee
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  2. Seong Je Park
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  4. Si Mo Yeon
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  5. Sukjoon Hong
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  6. Yong Son
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  7. Jiyong Park
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Correspondence to Jiyong Park.

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Lee, J.H., Park, S.J., Yang, J. et al. Crack Guidance Utilizing the Orientation of Additive Manufactured Lattice Structure. Int. J. Precis. Eng. Manuf. 23, 797–805 (2022). https://doi.org/10.1007/s12541-022-00654-x

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  • DOI: https://doi.org/10.1007/s12541-022-00654-x

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