Characteristics of On-Road Rollovers

Marine, Micky C.; Wirth, Jeffrey L.; Thomas, Terry

doi:10.4271/1999-01-0122

Cited by 29 publications

(7 citation statements)

References 11 publications

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“…The obtained superplasticizer SJ-1 has a good water-reducing effect. This makes polycarboxylate-based superplasticizers the most promising modifier [23][24][25][26]. Investigation of the effect of superplasticizer SJ-1 on cement stones' physical and mechanical properties is described below.…”

Section: Table 3 Test Results Of Cement Pastes With a Plasticizing Additive Based On Polyhydric Alcoholsmentioning

confidence: 99%

Development of high-strength concrete with the addition of a universal superplasticizer

Barkhanadzhyan

Riskulov

Karimov³

et al. 2021

E3S Web Conf.

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Automobile roads perform a particularly important, responsible function in the movement of every automobile, transport equipment. The quality of automobile roads determines the reliability of road construction and automotive equipment, the resource of their work, and, most importantly, ensuring traffic safety. However, the construction of roads and construction methods with the expiration of a certain time undergo significant changes associated with the intensive development of road transport, road construction equipment, an increase in the intensity and flow of traffic. In this regard, there is a need to build high-quality roads and cover roads with durable concrete, which can be achieved by upgrading with composite chemical additives in the composition of concrete - a modernized superplasticizer. The object of this work is a superplasticizer for producing wear-resistant concrete. The introduction of a superplasticizer into the composition of concrete makes it possible to obtain especially strong concrete with an increased service life, which in turn will significantly reduce material costs for raw materials, repair work, and labor resources. The purpose of this study is to obtain a highly effective superplasticizer and particularly durable wear-resistant concrete for road surfaces. To achieve this goal, it is necessary to solve the following tasks: prepare raw materials, develop an optimal component composition and obtain a superplasticizer; in laboratory conditions to obtain a prototype of concrete; determine the quality indicators of the resulting concrete by GOST; to conduct pilot tests for implementation in production.

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Section: Table 3 Test Results Of Cement Pastes With a Plasticizing Additive Based On Polyhydric Alcoholsmentioning

confidence: 99%

Development of high-strength concrete with the addition of a universal superplasticizer

Barkhanadzhyan

Riskulov

Karimov³

et al. 2021

E3S Web Conf.

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show abstract

“…where J z is the moment of inertia of the vehicle wheel relative to the Z axis, I хz is the centrifugal moment of inertia relative to the x and z axes, I хξ is the moment of inertia of the sprung parts of the vehicle relative to the x axis, ΣМ сш is the total elastic stabilizing moment of tires; ΣМ су is the total stabilizing moment due to the longitudinal tilt of the king pin; ΔM F is the moment from the difference in the forces of rolling resistance of the right and left wheels; M g is the gyroscopic moment that occurs when the camber variation changes; a, b are the distances to the center of gravity of the vehicles from the center of the front and rear axles of the wheels [22,23,24];…”

Section: Methodsmentioning

confidence: 99%

Modeling the steering wheel influence by the driver on the vehicle's motion stability

et al. 2021

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In this article, a mathematical model was developed to influence the intensity of the steering wheel turn by the driver on the vehicle's stability. Comparison of the developed mathematical model with the experiment results made it possible to establish their adequacy. The effect of the three conditional drivers on the intensity of the steering wheel was examined. When performing the 'J-turn' maneuver, comparing the indices of the 1st, 2nd and 3rd conditional drivers, their proximity to the requirements of the standard was established. It was found that the indices of the second conditional driver are closest to the standard requirements. When performing the 'Single Lane Change' maneuver by the first conventional driver, the standard deviation value from the specified trajectory was 0.102, and the correlation index was 0.88.

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“…Following are several examples of tripping mechanisms that can initiate a rollover: (1) interaction between a tire or wheel rim and pavement [6], (2) wheels furrowing into soil or sod [7,8], and (3) wheels impacting a curb [7,9]. For each of these mechanisms, the magnitude and duration of the tripping force and the manner in which that force is applied through time will vary.…”

Section: Trip Phase Motionmentioning

confidence: 99%

Factors Influencing Roof-to-Ground Impact Severity: Video Analysis and Analytical Modeling

Rose¹,

Beauchamp²,

Fenton³

2007

SAE Technical Paper Series

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This paper explores the dynamics of rollover crashes and examines factors that influence the severity of the roof-to-ground impacts that occur during these crashes. The paper first reports analysis of 12 real-world rollover accidents that were captured on video. Roll rate time histories for the vehicles in these accidents are reported and the characteristics of these curves are analyzed. Next, the paper uses analytical modeling to explore the influence that the trip phase characteristics may have on the severity of roof-to-ground impacts that occur during the roll phase. Finally, the principle of impulse and momentum is used to derive an analytical impact model for examining the mechanics of a roof-to-ground impact. This modeling is used to identify the influence of various impact conditions on the severity of a roof-to-ground impact.

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Characteristics of On-Road Rollovers

Cited by 29 publications

References 11 publications

Development of high-strength concrete with the addition of a universal superplasticizer

Development of high-strength concrete with the addition of a universal superplasticizer

Modeling the steering wheel influence by the driver on the vehicle's motion stability

Factors Influencing Roof-to-Ground Impact Severity: Video Analysis and Analytical Modeling

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