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The paper presents a numerical study on the effect of selected factors, i.e. the impact angle and the dry/ wet surface of roads and shoulders on the course of the TB11 virtual crash test. The testing is conducted for a N2-W4-A class barrier in a horizontal concave arc of 150 m radius, hit by a Geo Metro vehicle at an angle of 20°. The overlay is applied to approve the standard criteria, installed with screw connectors with rectangular rubber pads, fixed in the free holes of the guide. The numerical calculations were conducted in LS-Dyna environment, using a Geo Metro vehicle model, taken from the NCAC website and appropriately modified. The analysis included quantitative and qualitative crash test parameters, as per PN-EN 13171:2010 and PN-EN 1317-2:2010 standards. The designed composite-foam overlay allowed to adopt virtual crash tests for a standard-specific impact angle, under dry and wet conditions. The influence of the impact angle on the course of the crash test is complex. Increasing the angle to 30° can lead to unfulfilling the condition of redirecting the vehicle onto the road.

Influence of impact angle and humidity on TB11 virtual crash tests for SP-05/2 road safety barrier