Due to urbanization, it is difficult to secure a large knuckle crane workspace. To solve this problem, we developed a small knuckle crane combined with a one-ton truck. In this study, the safety of small knuckle cranes is evaluated through Finite Element Analysis. Shape optimization was performed using the Design of Experiment for parts speculated to have failed from fatigue. As a result, maximum equivalent stress of a plate in link speculated to have failed from fatigue was reduced by approximately 84.2%.
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Optimal Design of 50 ton Hydraulic Breaker Housing Jai Hak Lee, Dong Ju Lee, Jun Young Choi Journal of the Korean Society for Precision Engineering.2022; 39(4): 269. CrossRef
Due to the characteristics of domestic mountainous terrain, the tunnels are increasing. Therefore, an increased budget and more advanced equipment are required to maintain the tunnels cleanliness. As a study on shape optimization using the design of experiment, this paper assessed the design parameters affecting the maximum stress of an articulated hydraulic crane boom. As a result, the maximum stress of an optimized boom was 223.94 MPa at optimal factors. It showed an accuracy of 99.38% compared with the finite element analysis.
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Optimal Design of 50 ton Hydraulic Breaker Housing Jai Hak Lee, Dong Ju Lee, Jun Young Choi Journal of the Korean Society for Precision Engineering.2022; 39(4): 269. CrossRef