Computer Simulation of Recycled Content Guardrail Post Impacts

Abstract

Guardrail posts made of recycled plastics are becoming candidates for use in roadside safety features due to the nature of exhibiting properties that are useful in absorbing energy. Relatively few studies have specifically addressed the performance of recycled guardrail posts in strong-post guardrail systems. Few have reported success in this area. In this study, a detailed computer simulation study is performed to evaluate the crashworthiness of the recycled content guardrail posts. Results of a full-scale crash test are also used to verify the accuracy of the finite element models used in the simulation study. Based on the investigation, it is demonstrated that computer simulations can effectively model the dynamic response behavior of a crash event and provide valuable information about the impact performance of recycled content guardrail posts. Crash simulation results indicate that when proper quality recycled posts are used the guardrail system has the potential for meeting the National Cooperative Highway Research Program Report 350 recommendations.