Evaluating the Reliability of Underrun Protection System in Heavy Vehicles Using FEA

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Underrun protection systems, often known as underride guards, are utilized in trucks and buses to prevent intrusion of small passenger cars during the event of collision. Research figures reveal that trucks with a gross weight of more than 3.5 tonnes are involved in 20% of the road accidents; from which, 60% are car to truck accidents. It is obvious that the injuries are far more fatal for small vehicles during such collisions.

Underrun Protection System

Most common accidents however are front and rear collisions, resulting into fatal injuries for car passengers. This is manly because the bottom rear and front of the trucks nearly level with that of the head of an adult passenger seated in a car. In such instances, the only protection the car passenger has is a windshield. Due to the difference in height of a car bumper and the trailer platform, the crumple zones do not get involved and there’s a direct impact on the windshield without activating air bags, resulting into fatalities.

To protect car passenger during such collisions, many safety regulation authorities across different countries have made it mandatory for trucks to have front and rear underride guards.

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Rohan Belhe
About the Author: Rohan Belhe FEA specialist at Hi-Tech, is an expert at ANSYS APDL, ANSYS Mechanical, Simulia Abaqus, & Hyperworks. With more than 5 years of experience, Rohan has planned, coordinated and executed projects for off-highway vehicles, heavy machineries, engine & transmission, automotive & ancillaries, process equipment’s and pressure vessels. Rohan adept at co-ordination and QA/QC, handles a team of FEA engineers engaged in delivering accurate, timely and cost-effective solutions for building products & components design, fabricated metal & alloy product design, machinery design and medical devices.
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