An Overview of the Evolution of Computer Assisted Motor Vehicle Accident Reconstruction

Cheng, Philip H.; Sens, Michael J.; Wiechel, John F.; Guenther, Dennis A.

doi:10.4271/871991

Cited by 4 publications

(2 citation statements)

References 102 publications

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“…In the 1970s, a relatively simple mass-spring-damper nonlinear system, known as the LMS (Lumped Mass Spring) model, was used to simulate a frontal impact test of a vehicle (Kamal [2]). Cheng et al [3] presented an overview of the first computer simulations in vehicle collision and occupant kinematic analysis. Spethmann et al [4] analysed the influence of virtual crash simulation tools in the last 35 years on automotive research and product development.…”

Section: Introductionmentioning

confidence: 99%

Transient dynamic impact suppression of a Baja chassis using frontal and rear shock absorbers

Goher

Chenhui

Fadlallah

et al. 2017

International Journal of Crashworthiness

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This paper investigates the behavior of impact loading on a Baja vehicle chassis with frontal and rear shock absorbers, using transient dynamic analysis under different assumptions of contact conditions. Using a Baja car, a transient dynamic impact is performed in ANSYS Workbench 14.0, where the maximum deformation, stress, and strains are calculated over duration of the particular impact. The mathematical model of the chassis is derived based on Kelvin model in order to design the best parameters of stiffness and damping coefficient in shock absorbers to minimize the deformation of the frame with the same impact. To study the effects of shock absorber under loading on a vehicle chassis, multiple finite element simulations are performed with different methodologies. Each methodology uses a different assumption on loading and boundary conditions, which leads to different results.

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Section: Introductionmentioning

confidence: 99%

Transient dynamic impact suppression of a Baja chassis using frontal and rear shock absorbers

Goher

Chenhui

Fadlallah

et al. 2017

International Journal of Crashworthiness

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“…A tire model that represents the interaction between the tire and the road surface, and a driving model that describes how a vehicle moves when a driver applies the brakes and steers it, were combined with an impact model expressing the dynamics at the time of collision. There are a few advanced and sophisticated traffic accident reconstruction models (11)(12)(13) in which the interaction between tire and road surface is considered, but the tire models used are rather simplistic and not applicable to the current problem.…”

mentioning

confidence: 99%

Taking Tire Slip Ratio into Account and Estimating Friction Coefficients in Rear-End Collisions on Winter Roads

Nakatsuji

Hosseinlou

Kawamura

et al. 2001

Transportation Research Record: Journal of the Transportation R

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Road surface conditions in winter are very transient. A small change in the friction coefficient can have a large effect on vehicular movements. A friction coefficient measured at the scene directly after an accident may be different from the one at the time when the accident occurred. A traffic accident reconstruction method that can estimate friction coefficients based indirectly on in situ data is presented. First, it is pointed out that the friction coefficient is largely dependent on the tire slip ratio, in particular that of studless tires whose tread rubber is very soft and adhesive. It is emphasized that it makes sense to use a tire model that considers the slip ratio to estimate the friction coefficients more precisely. Rear-end collision accident data were collected. The types of vehicles involved in accidents were identified, and their friction coefficients at the time of skidding were estimated by the new reconstruction model. The friction coefficients estimated by this model were compared with those estimated by a conventional rigid-body model. In addition, by inversely calculating the friction coefficient required to avoid accidents, how an increment in the friction coefficient could greatly improve traffic safety is considered. Finally, it is shown that a threshold defined as the intersection of the cumulative curves of both friction coefficients provides useful information for winter maintenance.

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Kollisionsmechanik

Burg¹,

Gratzer²,

Moser³

et al. 2009

Handbuch Verkehrsunfallrekonstruktion

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An Overview of the Evolution of Computer Assisted Motor Vehicle Accident Reconstruction

Cited by 4 publications

References 102 publications

Transient dynamic impact suppression of a Baja chassis using frontal and rear shock absorbers

Transient dynamic impact suppression of a Baja chassis using frontal and rear shock absorbers

Taking Tire Slip Ratio into Account and Estimating Friction Coefficients in Rear-End Collisions on Winter Roads

Kollisionsmechanik

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