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Journal = Vehicles
Section = Safety and Security in Vehicles

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21 pages, 5325 KB  
Article
Fatigue Analysis of Commercial-Vehicle Lateral Stabilizer Bar Based on Load Decomposition Method
by Jiwei Zhang, Ziting Huang, Liang Li, Jun Zeng, Hui Yuan and Changcheng Yin
Vehicles 2026, 8(6), 133; https://doi.org/10.3390/vehicles8060133 - 16 Jun 2026
Viewed by 166
Abstract
As a core component for restraining cab roll, the lateral stabilizer bar bears continuous complex alternating loads during vehicle operation, making it highly susceptible to fatigue failure that may trigger severe traffic accidents. Therefore, fatigue analysis of the lateral stabilizer bar is of [...] Read more.
As a core component for restraining cab roll, the lateral stabilizer bar bears continuous complex alternating loads during vehicle operation, making it highly susceptible to fatigue failure that may trigger severe traffic accidents. Therefore, fatigue analysis of the lateral stabilizer bar is of great significance. To address the drawbacks of conventional direct load testing, such as difficult sensor arrangement and long test cycles, this paper proposes a fatigue-load decomposition and life evaluation method, combining multi-body dynamics and virtual iteration. Firstly, target signal spectra of the frame are obtained via real-vehicle road tests, and a high-precision system dynamic model is established with key suspension parameters. Subsequently, virtual iteration technology is adopted to accurately inverse-solve load spectra at critical points of the lateral stabilizer bar. Finally, the finite element model of the lateral stabilizer bar is validated through modal tests, and the fatigue life and vulnerable regions of the lateral stabilizer bar are predicted using the material S-N curve. Compared with traditional physical testing methods, the proposed method effectively avoids barriers to direct testing under complex operating conditions. It not only greatly reduces testing difficulty and time costs but also ensures the accuracy of load extraction and system analysis. Full article
(This article belongs to the Section Safety and Security in Vehicles)
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