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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2019, Vol. 40 ›› Issue (3): 422548-422548.doi: 10.7527/S1000-6893.2018.22548

• Material Engineering and Mechanical Manufacturing • Previous Articles    

Pin-load distribution homogenization method of adjusting bolt-hole clearance and bolt torqued in multi-bolt composite joints

LI Peng1, ZHOU Wanlin1, LI Bei2, SHAO Jintao1   

  1. 1. College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;
    2. College of Economics and Management, Nanjing Forestry University, Nanijing 210037, China
  • Received:2018-07-05 Revised:2018-08-06 Online:2019-03-15 Published:2018-10-19
  • Supported by:
    National Natural Science Foundation of China (11072110)

Abstract: A method of adjusting bolt-hole clearance and bolt torqued is proposed to improve the pin-load distribution in multi-bolt composite joints. First of all, based on the improved pin-load distribution measurement method, the multiple linear regression function of each pin-load ratio is obtained by SPSS and a linear optimization model is established with the bolt-hole clearance and bolt torque as design variables. Then, the optimization model is solved by simplex algorithm, obtaining the optimal solution. At last, the three-bolt, single-lap joint is taken as an example to compare the calculation and experimental results. The results show that the calculated optimization results agree well with the experimental results. After optimization, the maximum pin-load proportion decreases dramatically from 36.06% to 33.45%; the bearing capacity of the three-bolt, single-lap joints has increased by 10.8%; and the structure failure has been improved to pin-hole bearing failure.

Key words: composites, joints, clearance, bolt-torqued, load distribution, homogenization

CLC Number: