Effect of bolt preload on bearing response of single-lap, countersunkcomposite bolted joints

LI Rupeng; XIAO Ruiheng; GE Ende

doi:10.13801/j.cnki.fhclxb.20231107.001

Volume 41 Issue 7

Jul. 2024

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Article Navigation > Acta Materiae Compositae Sinica > 2024 > 41(7): 3765-3776

LI Rupeng, XIAO Ruiheng, GE Ende. Effect of bolt preload on bearing response of single-lap, countersunkcomposite bolted joints[J]. Acta Materiae Compositae Sinica, 2024, 41(7): 3765-3776. doi: 10.13801/j.cnki.fhclxb.20231107.001

Citation:

LI Rupeng, XIAO Ruiheng, GE Ende. Effect of bolt preload on bearing response of single-lap, countersunkcomposite bolted joints[J]. Acta Materiae Compositae Sinica, 2024, 41(7): 3765-3776. doi: 10.13801/j.cnki.fhclxb.20231107.001

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Effect of bolt preload on bearing response of single-lap, countersunkcomposite bolted joints

doi: 10.13801/j.cnki.fhclxb.20231107.001

LI Rupeng^{1, 2
,
,},
XIAO Ruiheng²,
GE Ende²

1.
School of Mechanical Engineering, Northwestern Polytechnical University, Xi'an 710072, China
2.
Aeronautical Manufacturing Technology Institute, COMAC Shanghai Aircraft Manufacturing, Shanghai 201324, China

Received Date: 2023-09-04
Accepted Date: 2023-10-26
Rev Recd Date: 2023-10-15

Available Online: 2023-11-08

Publish Date: 2024-07-01

Abstract

Abstract

Experimental and numerical studies on the bearing response of single-lap, countersunk composite joints which were designed according to ASTM 5961 under various bolt preload were presented. The specimens were manufactured from carbon fiber/epoxy unitapes with quasi-isotropic lay-ups. To obtain a more accurate hole strain, 2D digital image correlation (DIC) measurement technique was used. Three-dimensional finite element model was constructed using ABAQUS/standard and validated by comparing to the experiment. The validated model was used to provide a detailed stress analysis around the hole boundary considering various bolt preload and friction conditions. The results show that countersunk hole is the region where the severest damage occurs, and bolt preload could significantly improve the 2% hole deformation bearing strength but only slightly increase the ultimate bearing strength. Through stress analysis, increasing either bolt preload or friction between laminates are found to have an active effect on relieving stress concentration, and will make a better bearing performance of single-lap, single-bolt, countersunk composite joints.
- single-lap,
- countersunk composite joints,
- bolt preload,
- bearing tests,
- 2D DIC,
- finite element analysis
Long Abstrsct
Innovation Points

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References(36)

References

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