Innovative passive and active countermeasures for near side crash safety

Luzon-Narro, Javier; Arregui‐Dalmases, Carlos; Hernando, Luis M.; Core, Emiliano; Narbona, Alberto; Selgas, Carlos

doi:10.1080/13588265.2013.802938

Cited by 13 publications

(5 citation statements)

References 10 publications

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“…Finally, using the LS-DYNA software, we simulated and calculated the movement of the vehicle, the movement of the driver, and the changes in their injuries based on the deceleration provided by the AEB. (2) The active seatbelt we designed not only considered the protection effect on the driver but also explored the sensitivity ranking of key parameters through orthogonal experiments. We identified the optimal experimental group for the best parameters, which can improve driving comfort.…”

Section: Pros and Cons Of Modelmentioning

confidence: 99%

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Driver Injury from Vehicle Side Impacts When Automatic Emergency Braking and Active Seat Belts Are Used

Dao-wen

Liu

2023

Sensors

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As an advanced driver assistance system, automatic emergency braking (AEB) can effectively reduce accidents by using high-precision and high-coverage sensors. In particular, it has a significant advantage in reducing front-end collisions and rear-end accidents. Unfortunately, avoiding side collisions is a challenging problem for AEB. To tackle these challenges, we propose active seat belt pretensioning on driver injury in vehicles equipped with AEB in unavoidable side crashes. Firstly, records of impact cases from China’s National Automobile Accident In-Depth Investigation System were used to investigate a scenario in which a vehicle is impacted by an oncoming car after the vehicle’s AEB system is triggered. The scenario was created using PreScan software. Then, the simulated vehicles in the side impact were devised using a finite element model of the Toyota Yaris and a moving barrier. These were constructed in HyperMesh software along with models of the driver’s side seatbelt, side airbag, and side curtain airbag. Moreover, the models were verified, and driver out-of-position instances and injuries were evaluated in simulations with different AEB intensities up to 0.7 g for three typical side impact angles. Last but not least, the optimal combination of seatbelt pretensioning and the timing thereof for minimizing driver injury at each side impact angle was identified using orthogonal tests; immediate (at 0 ms) pretensioning at 80 N was applied. Our experiments show that our active seatbelt with the above parameters reduced the weighted injury criterion by 5.94%, 22.05%, and 20.37% at impact angles of 90°, 105°, and 120°, respectively, compared to that of a conventional seatbelt. The results of the experiment can be used as a reference to appropriately set the collision parameters of active seat belts for vehicles with AEB.

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Section: Pros and Cons Of Modelmentioning

confidence: 99%

“…Numerous types of collisions arise with complex characteristics and varying deadliness [1]. Side crashes, a common form of traffic collision, are twice as deadly as frontal crashes [2]. Equipping vehicles with autonomous emergency braking (AEB) systems can reduce traffic accidents by 27-38% [3].…”

Section: Introductionmentioning

confidence: 99%

Driver Injury from Vehicle Side Impacts When Automatic Emergency Braking and Active Seat Belts Are Used

Dao-wen

Liu

2023

Sensors

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“…Thin-walled beams are widely used for crashworthiness applications due to their advantages of low price, lightweight, high strength and stiffness, and excellent energy absorption capacity (Luzon-Narro et al, 2014). TWBs are commonly employed in automobiles, special purpose vehicles, roll-over and falling object protective structures, and other areas subjected to safety requirements (Long, Yuen, & Nurick, 2019;Luzon-Narro et al, 2014). At the time of impact, the beam deforms and absorbs a significant amount of energy (Long et al, 2019;Zhang, Yu, OuYang, & Chen, 2015).…”

Section: Introductionmentioning

confidence: 99%

Impact Energy Absorption Capability of Polygonal Cross-Section Thin-Walled Beams under Lateral Impact

Patil¹,

Bhosale²,

Dhepe³

et al. 2021

ijirss

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The continuing efforts of automotive technology aim to deliver even greater safety benefits and reduce the weight of a vehicle. Thin-walled beams (TWB) are widely used as strengtheners or energy absorbers in vehicle bodies due to their lightweight and excellent energy absorption capacity. Thus, researchers are interested in the collapse behaviour and mechanical properties of thin-walled beams under static and dynamic loadings. Circular TWB is commonly used in vehicle side doors. In the event of a side collision, this beam deforms and absorbs the greatest amount of impact energy. In this study, the energy absorption capability and crashworthiness of polygonal cross-section TWBs subjected to lateral impact was investigated using numerical simulations. Polygonal TWB ranging from square to dodecagon, as well as circular cross section, were selected for this study. Energy absorption (EA), specific energy absorption (SEA) and crash force efficiency (CFE) crashworthiness indicators are employed to evaluate the bending collapse performance. Because TWB thickness and weight have a greater impact on bending performance, they were kept constant across all polygons. In ABAQUS explicit dynamic software, finite element simulations are performed, and plastic hinges and flattening patterns of all polygons are examined. The results show that heptagon, octagon, and nonagon cross-section TWB perform better in crashworthiness than square and circular TWB.

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“…18 and Yoon et al. 19 In a study by Narroa et al., 20 six protective devices that simultaneously protect occupants in side-impacts were examined. The systems include: (1) dynamic doors, (2) inflatable side-impact beams, (3) external airbags that cover the door, (4) active armrest, (5) rotating seat, and (6) high-volume side airbag.…”

Section: Introductionmentioning

confidence: 99%

Optimization of performance in multi-cell beams with different surface slopes for use in vehicle structure using a multi-objective evolutionary algorithm based on decomposition

Chahardoli

Ahmadi²,

Tran

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part L:

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This study examined the effect of the upper surface slope and the number of cells in the side beams on the collapse properties using experimental and numerical tests. The numerical studies were conducted with LS-DYNA software, and the accuracy of numerical results was investigated by experimental tests. Using MATLAB software, the second-degree polynomial functions were obtained for the collapse properties of the specimens. Also, after the optimization by the decomposition method, the best mode was introduced for the specimens. The studies on collapse properties showed that increasing the number of cells leads to a decrease in all collapse properties, and increasing the upper surface slope leads to an increase in the collapse properties. Moreover, the optimization results by decomposition method showed that this method could suggest the most optimal model for multi-cell and sloping beams.

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Innovative passive and active countermeasures for near side crash safety

Cited by 13 publications

References 10 publications

Driver Injury from Vehicle Side Impacts When Automatic Emergency Braking and Active Seat Belts Are Used

Driver Injury from Vehicle Side Impacts When Automatic Emergency Braking and Active Seat Belts Are Used

Impact Energy Absorption Capability of Polygonal Cross-Section Thin-Walled Beams under Lateral Impact

Optimization of performance in multi-cell beams with different surface slopes for use in vehicle structure using a multi-objective evolutionary algorithm based on decomposition

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