The majority of vehicle structural failures originate from joint areas. Cyclic loading is one of the primary factors in joint failures, making the fatigue performance of joints a critical consideration in vehicle structure design. The use of traditional fatigue analysis methods is constrained by the absence of adhesive life data and the wide variety of joint geometries. Therefore, there is a pressing need for an accurate fatigue life estimation method for the joints in the automotive industry. In this work, we proposed a data-driven approach embedding physical knowledge-guided parameters based on experimental data and finite element analysis (FEA) results. Different machine learning (ML) algorithms are adopted to investigate the fatigue life of three typical adhesive joints, namely lap shear, coach peel and KSII joints. After the feature engineering and tuned process of the ML models, the preferable model using the Gaussian process regression algorithm is established, fed with eight input parameters, namely thicknesses of the substrates, line forces and bending moments of the adhesive bonded joints obtained from FEA. The proposed method is validated with the test data set and part-level physical tests with complex loading states for an unbiased evaluation. It demonstrates that for life prediction of adhesive joints, the data-driven solutions can constitute an improvement over conventional solutions.
The full text can be downloaded at https://link.springer.com/article/10.1007/s40436-024-00500-5
Chen-Di Wei
,
Qiu-Ren Chen
,
Min Chen
,
Li Huang
,
Zhong-Jie Yue
,
Si-Geng Li
,
Jian Wang
,
Li Chen
,
Chao Tong
,
Qing Liu
. Predicting fatigue life of automotive adhesive bonded joints: a data-driven approach using combined experimental and numerical datasets[J]. Advances in Manufacturing, 2024
, 12(3)
: 522
-537
.
DOI: 10.1007/s40436-024-00500-5
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