To analyze the integrated performance of designed system, we model the sample with ABAQUS Software considering the existing standards.
Moreover, to compare the performance of the system with other existing products, it is attempted to perform all tests available on both this sample and other common metal guardrails, and results are listed below.
To analyze the performance of this invention, considering the design of real pieces, these aspects are also evaluated in the model and the results of impact is recorded as graphic videos and chart analysis which is explained below.
The desired design standard for the maximum number of impacts applied to barriers, is NCHRP230, based on which two examples are analyzed:
- A 2000 kg vehicle running at 110 km/h and impact angle of 25 degrees
- A 40000 kg vehicle with an 80 km/h velocity and impact angle of 20 degrees
Tension and energy charts for the 40000 kg vehicle Road shield panels
Tension and energy charts for the 2000 kg vehicle by Road shield panels
Charts and compared results for metal guardrails with Road shield panels
By comparing the energy charts of two different designs, we conclude that based on the model, the amount of energy absorbed by Road shield panels when hit by a 2000 kg vehicle is increased by 25%, which is the amount needed for complete energy dissipation and for the 40000 kg vehicle, this amount is shown to be 3.5 times higher, which is a significant value.
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