Dr. Cody Stolle
Date of this Version
Published as: Schroder, B.D., Fallet, W.G., Faller, R.K., Stolle, C.S., Rasmussen, J.D., Bielenberg, R.W., Rosenbaugh, S.K., Ronspies, K.B., Development of an Energy Absorber for a New Roadside Safety End Treatment Option, Draft Report, Midwest Roadside Safety Facility, University of Nebraska-Lincoln, Lincoln, Nebraska, December 6, 2019.
A novel energy absorbing mechanism was developed for roadside crash cushion hardware to meet Manual for Assessing Safety Hardware Test Level 3 (MASH TL-3) standards. Component testing, modeling, and physical testing were conducted to evaluate the concept.
A total of 6 quasi-static component tests and 83 dynamic components tests were performed on test specimens. Results indicated that the novel energy absorption mechanism could be controlled to generate repeatable results and in the range of forces required to meet MASH TL-3 requirements. Energy absorption variations were assembled and evaluated analytically, and a prototype configuration was selected for testing at elevated speeds approaching MASH TL-3 impact speeds with a steel-frame bogie vehicle. While the system performed well, researchers investigated methods of controlling intermittent force spikes which were higher than the average system forces.
Additional component testing was conducted with a modified energy-absorber design, which demonstrated improved behavior and reduced differences between peak and average forces. A modified crash cushion design was recommended using the modified energy absorber concept.
Advisor: Cody Stolle