A New Vehicle Speed Estimation Method Based on the Longest Radial Crack on Windshield

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Pedestrian-vehicle accident without road marks has long been a headache to accident investigators. This paper suggested a new method with the application of fracture mechanics to estimate impact speed in pedestrian-vehicle. Firstly, a windshield crack propagation model based on the crack initiation model put forward by Freund [1] is established. In the model, crack bluntness coefficient is an unknown parameter, depending on various factors, so speed domain is then divided into five intervals and sample real-world accident cases are employed to the calibrate crack bluntness coefficient in different speed intervals. Further, fourth-order Runge Kutta’s method is used to solve the differential equation. Five additional real-world accident cases are then employed to verify the accuracy of the model. Results show good agreement between the model results and the real impact speeds. Finally, the advantages and limitations of this method are discussed.

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Periodical:

Edited by:

Shengyi Li, Yingchun Liu, Rongbo Zhu, Hongguang Li, Wensi Ding

Pages:

512-516

Citation:

J. Xu et al., "A New Vehicle Speed Estimation Method Based on the Longest Radial Crack on Windshield", Applied Mechanics and Materials, Vols. 34-35, pp. 512-516, 2010

Online since:

October 2010

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$41.00

[1] Freund LB: Dynamic fracture Mechanics. (Cambridge University press, New York 1990).

[2] Annual census of road traffic accident in People's Republic of China (2007) (Beijing: Research Institute of traffic management bureau of Public Safety Ministry 2008).

[3] NHSTA: Traffic Safety Facts. (Washington D.C. 2009).

[4] Limpert R: Motor Vehicle Reconstruction and Case Analysis. ( Michie, California 2005).

[5] Raymond M, Brach R, Brach M: Vehicle Accident Analysis and Reconstruction Methods. (SAE international Publisher , Warrendale, Pennsylvania 2005).

DOI: https://doi.org/10.4271/r-397

[6] Xu J, Li Y, Lu G, Zhou W: Int J Impact Eng Vol 36 (2009) p: 783-8.

[7] Xu J, Li Y: Int J Crashworthiness Vol 14(2009) p: 63-71.

[8] Zong Q, Cao G, Fu J: Fuxin Mining University Vol 13(1994) p: 18-21.

[9] Zukas JA, Nicholas T, Swift HF, Greszczuk LB, Curran DR. Impact dynamics. (John Wiley & Sons. Inc, New York 1982).

[10] Koutsawa Y, Daya EM: Int J Solids Struct Vol 44 (2007) p: 8735-50.