On the influence of the acceleration recording time on the calculation of impact severity indexes

Pachocki, Łukasz; Bruski, Dawid; Burzyński, Stanisław; Chróścielewski, Jacek; Wilde, Krzysztof; Witkowski, Wojciech

doi:10.1051/matecconf/201821903010

Cited by 3 publications

(2 citation statements)

References 7 publications

(6 reference statements)

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“…In both studies, artificial boundary conditions were applied for the pole bottom. In [ 13 ], the authors used a simplified vehicle model but focused on a realistic representation of the concrete barrier. Spring elements representing the soil surrounding a pole were used in [ 14 ] to investigate the influence of different pole supports on crash parameters.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Simulation of Vehicle–Lighting Pole Crash Tests: Parametric Study of Factors Influencing Predicted Occupant Safety Levels

Baranowski

Damaziak

2021

Materials

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In this paper, numerical simulations of the EN 12767 test procedure for a vehicle–lighting pole crash are presented. A representative soil–vehicle–lighting pole model is first developed. The Geo Metro vehicle model is used, and significant attention is given to representing the soil and its interaction with the traffic pole. Soil is represented using smoothed particle hydrodynamics (SPH) coupled with finite elements (FEs). A parametric study is carried out to investigate the key factors influencing the outcomes and consequently the estimation of the occupant safety levels during crash scenario described in EN 12767. First, a sensitivity study of lighting pole mesh is conducted As a result, the optimal mesh size is used for further studies regarding physical parameters such as soil properties and friction coefficient in vehicle–pole interfaces. Friction and mesh size are found to have a considerable influence on the acceleration severity index (ASI), theoretical head impact velocity (THIV), post-impact velocity and vehicle behavior during the lighting pole crash scenario.

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Section: Introductionmentioning

confidence: 99%

“…The status of numerical modeling is somewhat different for guardrails [ 13 , 18 , 19 , 20 ]. Utilization of numerical modeling of guardrail impact began in the 1980s with the development of computer programs such as GUARD and NARD [ 21 ].…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Vehicle–Lighting Pole Crash Tests: Parametric Study of Factors Influencing Predicted Occupant Safety Levels

Baranowski

Damaziak

2021

Materials

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Modeling, simulation, and validation of a TB41 crash test of the H2/W5/B concrete vehicle restraint system

Pachocki

Bruski

2020

Archiv.Civ.Mech.Eng

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The paper addresses numerical simulations of a concrete vehicle restraint system. The model is described in detail. The advanced material law of the continuous surface cap model was used to analyze the damage locations in concrete barrier segments. The results were validated against the TB41 full-scale crash test. The test was conducted in compliance with European standard EN 1317, and the validation was performed in accordance with the PD CEN/TR 16303 technical report. The force and moment envelopes of the road safety barrier during a vehicle crash are provided. The detailed concrete segment model successfully reproduced the characteristic splitting failure cracks that were found near the connection of the adjacent barrier segments in the actual structure after the full-scale crash test.

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Determination of ASI and THIV parameters based on the results of experimental and numerical research in relation to EU standards

Stopel

2021

MATEC Web Conf.

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Determining the values of ASI (Acceleration Severity Index) and THIV (Theoretical Head Impact Velocity) parameters during tests allows you to assign an appropriate class for a given type of object to determine the safety level and to give the CE marking. The paper presents the methodology for determining these parameters based on the EN 1317-1 and EN 12767 standards. The paper also presents a tool created with the use of the Python programming language, which, based on the results of experimental tests or the results of numerical calculations, allows to determine the ASI and THIV values. The values of key parameters from the point of view of normative tests were calculated based on the results of experimental tests of the road sign supporting mast and numerical analysis carried out for the same case using the Finite Element Method and LS-Dyna software, following the EN 12767 standard.

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On the influence of the acceleration recording time on the calculation of impact severity indexes

Cited by 3 publications

References 7 publications

Numerical Simulation of Vehicle–Lighting Pole Crash Tests: Parametric Study of Factors Influencing Predicted Occupant Safety Levels

Numerical Simulation of Vehicle–Lighting Pole Crash Tests: Parametric Study of Factors Influencing Predicted Occupant Safety Levels

Modeling, simulation, and validation of a TB41 crash test of the H2/W5/B concrete vehicle restraint system

Determination of ASI and THIV parameters based on the results of experimental and numerical research in relation to EU standards

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