Abstract
This study investigates the impact of design parameter adjustments on the vehicle’s strength and body weight. To generate a lightweight design for a vehicle body, the bus body is examined and optimised. The direct optimisation process is used to obtain optimised vehicle bodies by changing material, component’s wall thickness and material diversity. The entire body of the vehicle is considered, but local optimisation is prioritised in this work because some parts are affected more than others under different loading conditions. Three different loading conditions are decided by considering normal loads on the vehicle bodies under normal driving conditions. The vehicle’s body structure weight is minimised while stresses and deformations are created in the boundaries. Three different materials are initially analysed and optimised. The multi-material vehicle body is designed after combining two materials with the best optimisation performance using optimisation rates. After obtaining the multi-material-based vehicle structure, its initial analysis and optimisation procedures are calculated as single-material-based vehicle structures. Finally, four different optimised vehicle body structures are obtained: three single-material based and one multi-material based. The effects of different loading conditions, and design parameters, such as component wall thickness, material type, and material diversity, are investigated, along with their advantages and disadvantages.
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Data availability
The full numerical simulation results for this study are available upon request. If readers require access to the numerical simulation data, they may contact us via email.
Abbreviations
- \(\sigma\) :
-
Normal stress
- \(\varepsilon\) :
-
Normal strain
- \(\gamma\) :
-
Shear strain
- \(\Delta L\) :
-
Deformation
- \(\tau\) :
-
Torsional stress, Pa
- Q:
-
Static moment of area
- \(I\) :
-
Moment inertia
- J:
-
Polar moment of inertia
- \(\delta\) :
-
Maximum deformation
- \(\theta\) :
-
Angle
- F:
-
Applied force
- A:
-
Cross-section area load
- \(M\) :
-
Moment
- \(t\) :
-
Thickness
- \(W\) :
-
Static load on axes
- FEA:
-
Finite-element method
- TS:
-
Torsional stiffness
- BS:
-
Bending stiffness
- GFRP:
-
Glass fibre-reinforced plastic
- \(h\) :
-
Profile cross-section high
- \(b\) :
-
Profile cross-section width
- W:
-
Wheel base length
- T:
-
Width of the vehicle
- C.G.:
-
Center gravity of vehicle
- H:
-
Height from ground to the C.G.
- B:
-
Distance from C.G. to the front axle
- C:
-
Distance from C.G. to the rear axle
- W:
-
Vehicle weight
References
ASM Aerospace Specification Metal Inc., Retrieved from https://asm.matweb.com/search/SpecificMaterial.asp?bassnum=MA6061T6. Accessed: 15.02.2022
Aksoy, T. (2019). Design and Development of Mono-block Composite Structure to Reduce Weight of the Conventional Bus Body, Gebze Technical University, Institute of Pure and Applied Sciences, M.Sc Thesis.
Bathe, K. J. (2007). Finite element method. Wiley encyclopedia of computer science and engineering, 1–12.
Brumercik, F., Lukac, M., Caban, J., Krzysiak, Z., & Glowacz, A. (2020). Comparison of selected parameters of a planetary gearbox with involute and convex–concave teeth flank profiles. Applied Sciences, 10(4), 1417. https://doi.org/10.3390/app10041417
Chen, Y., Cheng, X., & Fu, K. (2019). Multi-material design of a vehicle body considering crashworthiness safety and social effects. International Journal of Crashworthiness., 25(5), 517–526. https://doi.org/10.1080/13588265.2019.1617095
Deulgaonkar, V. R., Kulkarni, M. S., Khedkar, S. S., Kharosekar, S. U., & Sadavarte, V. U. (2020). Self-weight and durability analysis of bus body structure using finite element analysis. International Journal of Vehicle Structures & Systems, 12(3), 322–328. https://doi.org/10.4273/ijvss.12.3.19
Duan, L., **ao, N. C., Hu, Z., Li, G., & Cheng, A. (2017). An efficient lightweight design strategy for body-in-white based on implicit parameterization technique. Structural and Multidisciplinary Optimization, 55(5), 1927–1943. https://doi.org/10.1007/s00158-016-1621-0
Fu, C. L., Bai, Y. C., Lin, C., & Wang, W. W. (2019). Design optimization of a newly developed aluminum-steel multi-material electric bus body structure. Structural and Multidisciplinary Optimization, 60(5), 2177–2187. https://doi.org/10.1007/s00158-019-02292-w
Haryanto, I., Raharjo, F. A., Kurdi, O., Haryadi, G. D., Santosa, S. P., & Gunawan, L. (2018). Optimization of bus body frame structure for weight minimizing with constraint of natural frequency using adaptive single-objective method. International Journal of Sustainable Transportation Technology, 1(1), 9–14. https://doi.org/10.31427/IJSTT.2018.1.1.2
Irsel, G. (2019). The effect of using shell and solid model in structure stress analysis. Vibroengineering Procedia, 27, 115–120. https://doi.org/10.21595/vp.2019.20977
İrsel, G. (2019). The effect of using shell and solid models in structural stress analysis. Vibroengineering Procedia, 27, 115–120. https://doi.org/10.21595/vp.2019.20977
Jain, R., Tandon, P., & Vasantha Kumar, M. (2014). Optimization methodology for beam gauges of the bus body for weight reduction. Applied and Computational Mechanics, 8(1), 47–62.
Jiacheng, Y. I. N., Zijian, L. I. U., & Huan, Q. (2018). Stiffness-chain mathematical model in forward concept design for an electric bus-body. Journal of Automotive Safety and Energy, 9(3), 325–332. https://doi.org/10.3969/j.issn.1674-8484.2018.03.012
Karamert,S. (2021) Topology and Thickness Optimization of Commercial Bus Body Structure Based on Body Stiffness, Marmara University, Institute of Pure and Applied Sciences, M.Sc Thesis.
Khan, M. M., & Swamy, D. R. (2019). Finite element analysis of car structure for bending and torsional stiffness. International Research Journal of Engineering and Technology, 6(7), 1477–1481.
Korta, J., & Uhl, T. (2013). Multi-material design optimization of a bus body structure. Journal of KONES, 20(1), 139–146. https://doi.org/10.5604/12314005.1135327
Lu, S., Ma, H., **n, L., & Zuo, W. (2019). Lightweight design of bus frames from multi-material topology optimization to cross-sectional size optimization. Engineering Optimization, 51(6), 961–977. https://doi.org/10.1080/0305215X.2018.1506770
Pravilonis, T., Sokolovskij, E., Kilikevičius, A., Matijošius, J., & Kilikevičienė, K. (2020). The usage of alternative materials to optimize bus frame structure. Symmetry, 12(6), 1010. https://doi.org/10.3390/sym12061010
Rail Corporation New South Wales (2013) EPR 0026 Static vehicle weigh test. Version 1.1., Engineering Procedure - Rolling Stock. Haymarket, Australia: Rail Corporation New South Wales, pp.1–9.
Sagar, S., Babu, N. S., & Kumar, K. M. (2018). Design of bus body structure by modal analysis. Invertis Journal of Science & Technology, 11(4), 204–213. https://doi.org/10.5958/2454-762X.2018.00026.4
Sinabuth, D., Benyajati, C., Lapapong, S., and Pimsarn, M. (2012) Finite element analysis of an electric bus body structure in real driving conditions, In Proc. 3rd TSME Int. Conf. Mechanical Engineering, Chiang Rai, Thailand.
Wang, D., **e, C., Liu, Y., Xu, W., & Chen, Q. (2020). Multi-objective collaborative optimization for the lightweight design of an electric bus body frame. Automotive Innovation, 3(3), 250–259. https://doi.org/10.1007/s42154-020-00105-1
Weir, G. B., Hass, J., and Giordano, F. R. (2005) Thomas’ calculus. 11th (international edition) Ed.
Zhi, S. Y., and Liu, H. J. (2012) Finite element analysis and optimizing design of the bus body. In Applied Mechanics and Materials. Trans Tech Publications Ltd, 215(216), 78–81. https://doi.org/10.4028/www.scientific.net/AMM.215-216.78
Zuo, W., Fang, J., Zhong, M., & Guo, G. (2018). Variable cross-section rectangular beam and sensitivity analysis for lightweight design of bus frame. International Journal of Automotive Technology, 19(6), 1033–1040. https://doi.org/10.1007/s12239-018-0100-6
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Koç, Ç., Yayla, P. Single- and Multi-material-Based Design of Lightweight Vehicle Body. Int.J Automot. Technol. (2024). https://doi.org/10.1007/s12239-024-00114-7
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DOI: https://doi.org/10.1007/s12239-024-00114-7