The paper describes the computational analysis and experimental crash tests of a new road safety barrier. The purpose of this research was to develop and evaluate a full-scale computational model of the road safety barrier for use in crash simulations and to further compare the computational results with real crash test data. A 34 m long segment of the road safety barrier was found to be sufficient for conducted impact analyses. The guardrail was modelled as a continuous element under presumption that the guardrail splices were not the weakest link. All parts of the road restraint system are made of the construction steel S 235. Standard tensile tests of different thickness specimens were carried out according to the standard DIN 50115 to obtain realistic material properties of analyzed road restraint elements in terms of their Young's modulus, yield stress, elasto-plastic relationship and ultimate strength. The impact severity and stiffness of the new design have been evaluated with the dynamic nonlinear elasto-plastic analysis of the three-dimensional road safety barrier within the framework of the finite element method with LS-DYNA code. Comparison of computational and experimental results proved the correctness of the computational model. The tests have also shown that the new safety barrier assures controllable crash energy absorption which in turn increases the safety of vehicle occupants.
Computational and experimental crash analysis of the road safety barrier
Rechnergestützte und experimentelle Aufprallanalyse einer Straßen-Sicherheitssperre
2005
11 Seiten, 13 Bilder, 8 Quellen
Conference paper
English
Crash compatibility between road safety barriers and cars
TIBKAT | 2006
|SAE Technical Papers | 1976
|Automotive engineering | 1976
|NTRS | 1983
|Analysis of developed transition road safety barrier systems
Elsevier | 2013
|