Load distribution law in multi-bolts connected composite structure

SONG Xin; LI Wei; LI Tong; WANG Chengbo; WANG Bo

doi:10.13801/j.cnki.fhclxb.20230926.002

Volume 41 Issue 4

Apr. 2024

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SONG Xin, LI Wei, LI Tong, et al. Load distribution law in multi-bolts connected composite structure[J]. Acta Materiae Compositae Sinica, 2024, 41(4): 2148-2156. doi: 10.13801/j.cnki.fhclxb.20230926.002

Citation:

SONG Xin, LI Wei, LI Tong, et al. Load distribution law in multi-bolts connected composite structure[J]. Acta Materiae Compositae Sinica, 2024, 41(4): 2148-2156. doi: 10.13801/j.cnki.fhclxb.20230926.002

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Load distribution law in multi-bolts connected composite structure

doi: 10.13801/j.cnki.fhclxb.20230926.002

SONG Xin¹,
LI Wei²,
LI Tong^{1
,
,},
WANG Chengbo²,
WANG Bo¹

1.
State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment, Dalian University of Technology, Dalian 116024, China
2.
Shenyang Aircraft Design Institute, Shenyang 110035, China

Funds: National Natural Science Foundation of China (12172077; 11825202); Dalian High-level Talent Innovation Support Program (2019RD04); Dalian Science and Technology Innovation Fund (2020JJ25CY011)

Received Date: 2023-07-05
Accepted Date: 2023-09-19
Rev Recd Date: 2023-09-15

Available Online: 2023-09-27

Publish Date: 2024-04-15

Abstract

Abstract

To address the issue of inconsistencies between the actual strength and failure mode of composite multi-row nail connection structures and traditional engineering algorithms, this study investigated nail load distribution patterns in composite connection structures based on fibre optic bolt testing techniques. The study primarily examines the effect of process characteristics such as nail load asymmetry, assembly sequence and assembly clearance on nail load distribution, while also establishing a high-precision finite element model for comparative study. The results indicate that asymmetric nail loading in a multi-row nail connection structure exacerbates uneven nail load distribution. Assembly sequence affects nail load distribution, and installing the outermost bolt last during bolt assembly can effectively reduce differences in nail load distribution. Nail load distribution in structures with uniform assembly clearance is consistent with load distribution in structures with no clearance. Additionally, the study finds that the proportion of critical bolt nail loads measured through testing is over 10% higher than the finite element results, suggesting that engineering algorithms need to be modified based on manufacturing and process characteristics such as assembly clearance.
- optical fiber bolt,
- composite connection structure,
- nail load distribution,
- finite element,
- multi-row bolt
Long Abstrsct
Innovation Points

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References(28)

References

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