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Computers and Concrete Volume 35, Number 2, February 2025 , pages 127-136 DOI: https://doi.org/10.12989/cac.2025.35.2.127 |
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Finite element analysis and experimental verification of the mechanical performance of a novel easy-to-splice mechanical coupler |
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Sukhwan Chung, Seongmin Jang, Ildong Seo, Nakyoung Lee, Wanjin Chung and Mansoo Joun
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| Abstract | ||
| A novel easy-to-splice mechanical coupler (EtSMC) involving a sleeve, two caps, two racks, two rack guides, and two springs is introduced; this coupler easily and tightly connects two rebars through a simple manual operation (without any tool) on a construction site. The mechanical performance (including the pull force/stroke curve of the EtSMC assembly) is experimentally examined via tensile testing in air. A finite element analysis (FEA) model that minimizes simplification of the conceptual design is presented; the spring reaction is assumed to be mechanically symmetrical. The experimental tensile test is numerically analyzed using a fully implicit elastoplastic FEA function and a multi-body treatment scheme based on the tetrahedral MINI-element technique. The predictions are in qualitatively good agreement with the experimental data in terms of both the pull force/stroke curve and the damaged regions of the racks and rack guides. Small differences between the curves can be attributed to some experimental slip between parts. | ||
| Key Words | ||
| easy-to-splice; implicit elastoplastic FEA; mechanical coupler; pull force-stroke curve; slip distance; strength | ||
| Address | ||
| Sukhwan Chung and Seongmin Jang: MFRC, Research and Development Center, 1209-A, 12, Dongbu-ro 169beng-gil, Jinju-si, Gyeongsangnam-do, 52818, Republic of Korea Ildong Seo and Nakyoung Lee: Dae Jung Metal Co.,Ltd, Research and Development Center, 26-62, Sangdong-ro 375ben-gil, Sngdong-myeon, Gimhae-si, Gyeongsangnam-do, 50805, Republic of Korea Wanjin Chung: Department of Mechanical System Design Engineering, Seoul National University of Science and Technology, 232, Gongneung-ro, Nowon-gu, Seoul, 01811, Republic of Korea Mansoo Joun: Engineering Research Institute, School of Mechanical Engineering, Gyeongsang National University, 103-403, 501, Jinju-daero, Jinju-si, Gyeongsangnam-do, 52828, Republic of Korea | ||