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Impact Simulation and Structural Optimization of a Vehicle CFRP Engine Hood in terms of Pedestrian Safety
Technical Paper
2020-01-0626
ISSN: 0148-7191, e-ISSN: 2688-3627
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Abstract
With the rapidly developing automotive industry and stricter environmental protection laws and regulations, lightweight materials, advanced manufacturing processes and structural optimization methods are widely used in body design. Therefore, in order to evaluate and improve the pedestrian protection during a collision, this paper presents an impact simulation modeling and structural optimization method for a sport utility vehicle engine hood made of carbon fiber reinforced plastic (CFRP). Head injury criterion (HIC) was used to evaluate the performance of the hood in this regard. The inner panel and the outer panel of CFRP hood were discretized by shell elements in LS_DYNA. The Mat54-55 card was used to define the mechanical properties of the CFRP hood. In order to reduce the computational costs, just the parts contacted with the hood were modeled. The simulations were done in the prescribed 30 impact points. In order to validate the reduced finite element model, pedestrian impact tests were carried out. To further improve the performance in terms of pedestrian safety, CFRP layers were added to strengthen the outer panel. A parametric optimization was carried out. Surrogate model was constructed by three approximation approaches and the errors were compared. Four algorithms were utilized to solve the optimization problem. The best optimization is done through Kriging model approximation and the non-dominated sorting genetic algorithm-the third version (NSGA-III). The optimal design is relatively light and reduces the HIC value of the critical point from 2397 to 876. This method can be a useful tool for pedestrian protection and related works.
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Gao, Y., Ma, C., and Tian, L., "Impact Simulation and Structural Optimization of a Vehicle CFRP Engine Hood in terms of Pedestrian Safety," SAE Technical Paper 2020-01-0626, 2020, https://doi.org/10.4271/2020-01-0626.Data Sets - Support Documents
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References
- World Health Organization 2017 https://apps.who.int/iris/handle/10665/254759
- Kumaresh , G. , Joerg , M. , and Lich , T. Comprehensive Study on Crashes with Pedestrians on Indian Roads SAE Technical Paper 2019-26-0004 2019 https://doi.org/10.4271/2019-26-0004
- World Health Organization 2015 https://www.who.int/violence_injury_prevention/road_safety_status/2015/en/
- Shin , J. , Untaroiu , C. , Kerrigan , J. , Crandall , J. et al. Investigating Pedestrian Kinematics with the Polar-II Finite Element Model SAE Technical Paper 2007-01-0756 2007 https://doi.org/10.4271/2007-01-0756
- Crocetta , G. , Piantini , S. , Pierini , M. , and Simms , C. The Influence of Vehicle Front-end Design on Pedestrian Ground Impact Accident Analysis and Prevention 79 56 69 2015 10.1016/j.aap.2015.03.009
- Nie , B. , Huang , J. , Xia , Y. , et al. Development of a Parametric Vehicle Front Structure Model for Pedestrian Impact Simulations Proceedings of the FISITA 2012 World Automotive Congress Springer, Berlin, Heidelberg 2013 295 309 10.1007/978-3-642-33805-224
- Mueller , B. , Farmer , C. , Jermakian , J. , and Zuby , D. Relationship between Pedestrian Headform Tests and Injury and Fatality Rates in Vehicle-to-Pedestrian Crashes in the United States SAE Technical Paper, 2013-22-0007 2013 https://doi.org/10.4271/2013-22-0007
- Menna , C. et al. Numerical simulation of impact tests on GFRP composite laminates International Journal of Impact Engineering 38 8 677 685 2011 10.1016/j.ijimpeng.2011.03.003
- Masoumi , A. , Shojaeefard , M.H. , and Najibi , A. Comparison of Steel, Aluminum and Composite Bonnet in Terms of Pedestrian Head Impact Safety Science 10 49 1371 1380 2011 10.1016/j.ssci.2011.05.008
- Torkestani , A. , Sadighi , M. , and Hedayati , R. Effect of Material Type, Stacking Sequence and Impact Location on the Pedestrian Head Injury in Collisions Thin-Walled Structures 97 130 139 2015 10.1016/j.tws.2015.09.015
- Ahmed , A. and Wei , L. Introducing CFRP as an Alternative Material for Engine Hood to Achieve Better Pedestrian Safety Using Finite Element Modeling Thin-Walled Structures 99 97 108 2016 10.1016/j.tws.2015.11.001
- Shojaeefard , M.H. , Najibi , A. , and Ahmadabadi , M.R. Pedestrian Safety Investigation of the New Inner Structure of the Hood to Mitigate the Impact Injury of the Head Thin-Walled Structures 77 77 85 2014 10.1016/j.tws.2013.11.003
- Kim , D.H. et al. Improving Pedestrian Safety via the Optimization of Composite Hood Structures for Automobiles Based on the Equivalent Static Load Method Composite Structures 176 780 789 2017 10.1016/j.compstruct.2017.06.016
- Untaroiu , C.D. , Shin , J. , and Crandall , J.R. A Design Optimization Approach of Vehicle Hood for Pedestrian Protection International Journal of Crashworthiness 6 12 581 589 2007 10.1080/13588260701492947
- Gao , Y. , Gao , Y. , Qian , R. , Xu , Y. et al. Concurrent Optimization of Ply Orientation and Thickness for Carbon Fiber Reinforced Plastic (CFRP) Laminated Engine Hood SAE Technical Paper 2018-01-1121 2018 https://doi.org/10.4271/2018-01-1121
- Standardization Administration of the People’s Republic of China 2009
- Henn , H.-W. Crash Tests and the Head Injury Criterion Teaching Mathematics and Its Applications 4 17 162 170 1998 10.1093/teamat/17.4.162
- Gibson , R.F. Principles of Composites Material Mechanics Boca Raton CRC Press 2016 10.1201/b19626
- Kongsakul , W. and Carmai , J. Finite Element Analysis of Pedestrian-City Car Collisions to Assist Design of Pedestrian Friendly Front Structure SAE Technical Paper 2014-01-2026 2014 https://doi.org/10.4271/2014-01-2026
- Elarbi , M. , Bechikh , S. , and Said , L.B. On the Importance of Isolated Infeasible Solutions in the Many-objective Constrained NSGA-III Knowledge-Based Systems 2018 10.1016/j.knosys.2018.05.015
- Li , H. , Deb , K. , Zhang , Q. , Suganthan , P.N. , and Chen , L. Comparison between MOEA/D and NSGA-III on a Set of Novel Many and Multi-Objective Benchmark Problems with Challenging Difficulties Swarm and Evolutionary Computation 46 104 117 2019 10.1016/j.swevo.2019.02.003
- Li , C. and Kim , I. Lightweight Optimal Design of a Rear Bumper System Based on Surrogate Models SAE Technical Paper 2015-01-1362 2015 https://doi.org/10.4271/2015-01-1362
- Forrester , A.I.J. and Keane , A.J. Recent Advances in Surrogate-based Optimization Progress in Aerospace Sciences 45 1-3 50 79 2009 10.1016/j.paerosci.2008.11.001