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The directional dynamics of the commercial tractor-semitrailer vehicle during braking
This paper describes an analytical study of a commercial tractor-semitrailer vehicle which is subjected to various brake applications in a turn. A hybrid computer simulation of the vehicle is used to investigate the effect of loading condition, brake-torque distribution, brake application times,...
Brake system component dynamic performance measurement and analysis
The results of a comprehensive investigation into the dynamic performance of braking-system components are presented. Typical transient and sinusoidal dynamic response data are illustrated for drum and disc brakes, and rigid and flexible brake lines. Laboratory transient response data for complete...
Psychological research in automobile rear lighting
The rear lighting and signaling system of automotive vehicles was considered to be one component of the traffic system which was amenable to development to provide improvements in driver performance and, hence, in accident reduction. The problem was discussed in the context of primary and...
An analysis of tire traction properties and their influence on vehicle dynamic performance
An analysis is made of the influence of tire-mechanics characteristics on the behavior of an automobile undergoing maneuvers requiring the tires to produce combined longitudinal and lateral forces. The mathematical model employed to represent the vehicle incorporates wheel rotational degrees of...
Three-dimensional simulation of advanced automotive restraint systems
This paper reports on the development and use of a three-dimensional mathematical model of vehicle occupant kinematics for the purpose of studying various seat, restraint system, and occupant configurations in a crash environment. This model includes three masses representing the head, torso, and...
Methodology for establishing and operating productive accident investigation programs
Based upon nine years of experience in conducting in-depth, clinical motor vehicle accident investigations, the conditions and practices that have been found to be essential to the collection of reliable and adequate information are defined. The role of the director and the selection of personnel...
Development of a mechanical model of the human head - determination of tissue properties and synthetic substitute materials
A variety of mechanical head forms is used today in the evaluation of the crashworthiness of automotive interiors and the effectiveness of helmet designs. Most head forms are of a very rigid metallic construction, although frangible head forms that indicate skull fracture are presently available....

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