Paper Title:

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

Periodical Applied Mechanics and Materials (Volumes 34 - 35)
Main Theme Mechanical Engineering and Green Manufacturing
Edited by Shengyi Li, Yingchun Liu, Rongbo Zhu, Hongguang Li, Wensi Ding
Pages 512-516
DOI 10.4028/www.scientific.net/AMM.34-35.512
Citation Jun Xu et al., 2010, Applied Mechanics and Materials, 34-35, 512
Online since October, 2010
Authors Jun Xu, Meng Yi Zhu, Bo Han Liu, Yue Ting Sun, Yi Bing Li
Keywords Accident Reconstruction, Crack, Dynamic Fracture, Pedestrian-Vehicle Accident, PVB Windshield
Price US$ 28,-
Article Preview
View full size
Abstract

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.