Numerical analysis of impact effect on mechanical behavior of strong guardrail system

Shen, Xin; Guo, Lianjun; Yang, Lü; Du, X.; Cao, Pan

doi:10.1088/1742-6596/96/1/012036

Cited by 4 publications

(3 citation statements)

References 1 publication

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“…Indeed, several authors [11][12][13][14][15][16] performed impact analyses using finite element FE techniques resulting in a satisfactory representation of a car crashing against a barrier. Reference [17] presented a literature review on road concrete barriers under impact loads, while [16] presented virtual impact analyses of metal defences operating under normal and irregular conditions.…”

Section: Introductionmentioning

confidence: 99%

Performance of some basic types of road barriers subjected to the collision of a light vehicle

Neves

Fransplass

Langseth

et al. 2018

J Braz. Soc. Mech. Sci. Eng.

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The investigation of the performance of road barriers to the car collision is not very often studied in the literature despite the importance of the topic to the passengers' safety. Indeed, the various road barriers systems are seldom compared in terms of their capabilities in reducing the overall damage in an accident. Here, flexible and rigid road restraint system subjected to a 900 kg car impact is studied in detail via a finite element simulation, with the model being validated against experimental results. The model relies on dynamic material properties for the guardrail, which were measured in Split Hopkinson Pressure Bar. Three severity occupant indexes, ASI, THIV and PHD, are explored and used to infer road barriers behaviour when interacting with a light vehicle. It is also investigated the failure limit of bolted connections and its influence on the guardrail impact result by means of the car trajectory. According to test TB11 from EN 1317 standard, the impact simulation results using a 900 kg car show that the flexible guardrail is safer than any of the analysed concrete barriers.

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Section: Introductionmentioning

confidence: 99%

Performance of some basic types of road barriers subjected to the collision of a light vehicle

Neves

Fransplass

Langseth

et al. 2018

J Braz. Soc. Mech. Sci. Eng.

View full text Add to dashboard Cite

show abstract

“…Shen et al (2008) • Jacobiano: mínimo 0,6 -razão entre o mínimo e o máximo determinante da matriz Jacobiana (matriz de transformação do elemento para um elemento ideal 1 x 1 un);…”

Section: Outras Simplificaçõesunclassified

Avaliação do desempenho da defensa metálica maleável simples utilizada nas vias brasileiras, em diversas condições de instalação.

Yoneda¹

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“…A referência Sennah et al (2003) analisa numericamente soluções de fixação da viga por postes de madeira e metálicos de formatos diferentes, afim de aumentar a energia de impacto absorvida pelo defensa metálica. Por outro lado, Shen et al (2007)…”

Section: Revisão Bibliográficaunclassified

Desempenho de defensas rodoviárias sujeitas ao impacto de automóveis.

Neves¹

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The main function of a road guardrail is to redirect an out of control vehicle avoiding a frontal collision or a dangerous veering off the road trajectory. Secondarily, the energy absorption measured by barrier deformation or any other energy dissipation method is beneficial to the car occupant safety. Considering the previous tasks and some severity occupant index like ASI, THIV and PHD, the performance of a guardrail and other concrete barriers are classified. Besides, it is investigated the fail mechanism of bolted connections and its influence on the guardrail impact result of an automobile. Special attention was taken into the material behavior modeling under low and high strain rates. Thereby, the need of accessing dynamic material properties motivated the design and manufacture of a Hopkinson Bar setup for tension and compression tests up to 5000s-1. In addition, a simplified analytical model of a guardrail subjected to a static force was settled in order to validate a guardrail finite element model. A parametric study of the bolted connection failure was performed through several impact simulations of a light car model and a guardrail according to EN 1317 standard. The impact simulation results using a light vehicle car model and different barriers types were compared through the occupant severity index showing that the guardrail is a safer system than concrete barrier with New Jersey or vertical profile.

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Numerical analysis of impact effect on mechanical behavior of strong guardrail system

Cited by 4 publications

References 1 publication

Performance of some basic types of road barriers subjected to the collision of a light vehicle

Performance of some basic types of road barriers subjected to the collision of a light vehicle

Avaliação do desempenho da defensa metálica maleável simples utilizada nas vias brasileiras, em diversas condições de instalação.

Desempenho de defensas rodoviárias sujeitas ao impacto de automóveis.

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