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Open AccessArticle

Impact Performance Evaluation of a Crash Cushion Design Using Finite Element Simulation and Full-Scale Crash Testing

1
Department Faculty of Engineering and Natural Sciences, Sabanci University, Main Campus, İstanbul 34956, Turkey
2
Department of Civil Engineering, Istanbul Technical University, Ayazaga Campus, İstanbul 34469, Turkey
3
Ulukur Plastic Traffic Products, İstanbul 34870, Turkey
*
Author to whom correspondence should be addressed.
Safety 2018, 4(4), 48; https://doi.org/10.3390/safety4040048
Received: 22 August 2018 / Revised: 7 October 2018 / Accepted: 25 October 2018 / Published: 1 November 2018
(This article belongs to the Special Issue Design for Transport Safety)
Crash cushions are designed to gradually absorb the kinetic energy of an impacting vehicle and bring it to a controlled stop within an acceptable distance while maintaining a limited amount of deceleration on the occupants. These cushions are used to protect errant vehicles from hitting rigid objects, such as poles and barriers located at exit locations on roads. Impact performance evaluation of crash cushions are attained according to an EN 1317-3 standard based on various speed limits and impact angles. Crash cushions can be designed to absorb the energy of an impacting vehicle by using different material deformation mechanisms, such as metal plasticity supported by airbag folding or damping. In this study, a new crash cushion system, called the ulukur crash cushion (UCC), is developed by using linear, low-density polyethylene (LLDPE) containers supported by embedded plastic energy-absorbing tubes as dampers. Steel cables are used to provide anchorage to the design. The crashworthiness of the system was evaluated both numerically and experimentally. The finite element model of the design was developed and solved using LS-DYNA (971, LSTC, Livermore, CA, USA), in which the impact performance was evaluated considering the EN 1317 standard. Following the simulations, full-scale crash tests were performed to determine the performance of the design in containing and redirecting the impacting vehicle. Both the simulations and crash tests showed acceptable agreement. Further crash tests are planned to fully evaluate the crashworthiness of the new crash cushion system. View Full-Text
Keywords: crash cushion; crash test; simulation; LS-DYNA; EN 1317; road safety; energy absorption; linear, low-density polyethylene crash cushion; crash test; simulation; LS-DYNA; EN 1317; road safety; energy absorption; linear, low-density polyethylene
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Büyük, M.; Atahan, A.O.; Kurucuoğlu, K. Impact Performance Evaluation of a Crash Cushion Design Using Finite Element Simulation and Full-Scale Crash Testing. Safety 2018, 4, 48.

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