导航

Acta Aeronautica et Astronautica Sinica ›› 2023, Vol. 44 ›› Issue (14): 428029-428029.doi: 10.7527/S1000-6893.2022.28029

• Material Engineering and Mechanical Manufacturing • Previous Articles    

Aluminum alloy clinch-bonding with hot melt adhesive film and joint failure analysis

Jiangbo CHEN, Kai ZENG(), Baoying XING, Hongshen ZHANG, Yanfang DING, Xiaocong HE   

  1. Faculty of Mechanical and Electrical Engineering,Kunming University of Science and Technology,Kunming 650500,China
  • Received:2022-09-21 Revised:2022-11-03 Accepted:2022-11-28 Online:2022-12-02 Published:2022-11-29
  • Contact: Kai ZENG E-mail:kmzk201109@163.com
  • Supported by:
    National Natural Science Foundation of China(51565022)

Abstract:

Hot melt adhesive film was used as adhesive to carry out the experimental research on the composite bonding process of clinch-bonding. Based on Box-Behnken Design (BBD) method, the multiple regression equation between factors (punch pressure, film thickness, sheet hardness) and response values (energy absorption value, failure load) was established, and the internal relationship between factors and response values was analyzed. Combined with the finite element model of mechanical internal locking structure of joint, the fracture failure mode of joint was investigated. The results show that the multiple regression model has high significance and high fitting degree, and the maximum error of energy absorption value and failure load between the experimental value and the predicted value is 7.9% and 11.42%, which verifies the reliability of the model. The punch pressure is positively correlated with energy absorption value and failure load, and the influence of film thickness on energy absorption value and failure load decreases first and then increases. The mechanical properties of the joint are obviously improved by adding film. When the joint is under tension, the failure mode is mainly pull-off failure and mixed failure (pull-off and neck fracture occur simultaneously), and the finite element analysis is in good agreement with the test.

Key words: clinching, hot melt adhesive film, composite connection, regression model, mechanical properties, finite element simulation

CLC Number: