ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Fast optimization method for nail load homogenization of composite joint structures
Received date: 2024-03-04
Revised date: 2024-03-21
Accepted date: 2024-04-07
Online published: 2024-04-19
Supported by
National Natural Science Foundation of China(12172077)
A parameter optimization method for bolt-hole clearance based on the concept of optimal curve is proposed to achieve a fast optimization search for the uniformity of nail load of any double-lap composite joint structure. The optimal Latin hypercube algorithm and NLPQL algorithm are combined for the bolt-hole clearance， and a combined optimization strategy is used to achieve the uniformity of the bolt load of the composite joints. We further propose the concept of optimal curve based on the distribution of the optimal bolt-hole clearance， according to which a fast optimization search is conducted to achieve uniformity of the nail load in the double-lap composite joint structure. Then， various joint structures are designed to study the effects of fastening torque， number of bolts and structural parameters on the optimal curve， and the applicability of the optimal curve is verified by numerical simulation. The study shows that the optimal curve can be utilized to maximize the uniform distribution of bolt load in the composite joints. For the six-row bolt composite joints， the load-carrying capacity can be increased by over 15%.
Wei LI , Xin SONG , Xiangqi LIN , Zhilin SU , Chengbo WANG , Tong LI . Fast optimization method for nail load homogenization of composite joint structures[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2024 , 45(23) : 230345 -230345 . DOI: 10.7527/S1000-6893.2024.30345
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