Journal
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART D-JOURNAL OF AUTOMOBILE ENGINEERING
Volume 231, Issue 1, Pages 84-98Publisher
SAGE PUBLICATIONS LTD
DOI: 10.1177/0954407016633550
Keywords
Assessment of fatigue failure locations; finite element analysis; virtual iteration; commercial vehicle cab; structural improvement
Funding
- Scientific Research and Industry Promotion Project of the Jiangsu Provincial Education Department, People's Republic of China [BY2014004-04]
- Scientific Research and Industry Promotion Project of Nanjing [201306011]
- Postgraduate Education and Innovation Project of Jiangsu Province [KYLX-0337]
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In this paper, fatigue damage analysis and structural improvement of a commercial vehicle cab were carried out, in which a simulation technique and durability road tests were combined. A full-scale finite element model of the cab was established and then validated by means of physical testing and analysis of its stiffness and its modal performance. The loading spectra, in accordance with the durability road test, were obtained by adopting the virtual iteration method. With the established finite element model, the stress distributions in the cab under unit excitation were determined. The obtained stress distributions were then used to assess the total fatigue life of the cab by employing the strain-life (e-N) method; thus, the critical regions were determined. The results showed that some components near the pillars and mounts are easy to damage because of the stress concentrations. It was also demonstrated that the predicted regions are reliable, which was verified by comparison with the physical durability road tests. Finally, structural improvements in the critical structures were made; the fatigue life assessment of the improved cab showed an obvious improvement in its durability performance.
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