Research Papers

Development of a Crash Cushion Using the Frictional and Inertial Energy by Computer Simulation

Filename cmrsc19_56.pdf
Filesize 1 MB
Version 1
Date added June 7, 2009
Downloaded 1 time/fois
Category 2009–CMRSC-XIX–Saskatoon
Tags Session 5B
Author/Auteur Dong Seong Kim, Louissa Ridad, Kee Dong Kim, Man Gi Ko

Abstract

Crash cushions are protective devices that prevent errant vehicles from impacting on fixed objects. This function is accomplished by gradually decelerating a vehicle to a safe stop in a relatively short distance. Commonly used crash cushions generally employ one of two concepts to accomplish this function. The first concept involves the absorption of the kinetic energy of a moving vehicle by crushable or plastically deformable materials and the other one involves the transfer of the momentum of a moving vehicle to an expendable mass of material located in the vehicle's path. Crash cushions using the first concept are generally referred to as compression crash cushions and crash cushions using the other concept are generally referred to as inertial crash cushion. The objective of this research is the development of a compression-type crash cushion by employing the two concepts simultaneously. To minimize the number of full-scale crash tests for the development of the crash cushion, preliminary design guide considering inertial and frictional energy absorption was constructed and computer simulation was performed. LS-DYNA program, which is most widely used to analyze roadside safety features, was used for the computer simulation. The developed crash cushion satisfied the safety evaluation criteria for various impact conditions of CC2 performance level in the Korean design guide.

Dong Seong Kim, Louissa Ridad, Kee Dong Kim, Man Gi Ko