Development of compatibility assessments for full-width and offset frontal impact test procedures in FIMCAR

Adolph, Thorsten; Schwedhelm, Holger; Lázaro, Ignacio; Versmissen, Ton; Edwards, Mervyn; Thomson, Robert; Johannsen, Heiko

doi:10.1080/13588265.2014.909562

Cited by 3 publications

(5 citation statements)

References 5 publications

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“…This vehicle velocity at the peak was lower than the current injury distributions. In the accident analysis in frontal vehicle collisions, the peak number of AIS 2+ injuries was at 35 km/h and the peak of AIS 3+ injuries was at 50 km/h (Adolph et al 2014). The constraint conditions are probably needed in the calculation to obtain more realistic solutions: The calculated number of injuries must be less than the number of injuries in accidents at each velocity.…”

Section: Discussionmentioning

confidence: 99%

Crash Pulse Optimization for Occupant Protection at Various Impact Velocities

Ito

Yokoi

Mizuno

2014

Traffic Injury Prevention

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Objective: Vehicle deceleration has a large influence on occupant kinematic behavior and injury risks in crashes, and the optimization of the vehicle crash pulse that mitigates occupant loadings has been the subject of substantial research. These optimization research efforts focused on only high-velocity impact in regulatory or new car assessment programs though vehicle collisions occur over a wide range of velocities. In this study, the vehicle crash pulse was optimized for various velocities with a genetic algorithm. Method: Vehicle deceleration was optimized in a full-frontal rigid barrier crash with a simple spring-mass model that represents the vehicle-occupant interaction and a Hybrid III 50th percentile male multibody model.To examine whether the vehicle crash pulse optimized at the high impact velocity is useful for reducing occupant loading at all impact velocities less than the optimized velocity, the occupant deceleration was calculated at various velocities for the optimized crash pulse determined at a high speed.The optimized vehicle deceleration-deformation characteristics that are effective for various velocities were investigated with 2 approaches.Results: The optimized vehicle crash pulse at a single impact velocity consists of a high initial impulse followed by zero deceleration and then constant deceleration in the final stage. The vehicle deceleration optimized with the Hybrid III model was comparable to that determined from the spring-mass model.The optimized vehicle deceleration-deformation characteristics determined at a high speed did not necessarily lead to an occupant deceleration reduction at a lower velocity.The maximum occupant deceleration at each velocity was normalized by the maximum deceleration determined in the single impact velocity optimization. The resulting vehicle deceleration-deformation characteristic was a square crash pulse. The objective function was defined as the number of injuries, which was the product of the number of collisions at the velocity and the probability of occupant injury. The optimized vehicle deceleration consisted of a high deceleration in the initial phase, a small deceleration in the middle phase, and then a high deceleration in the final phase.Conclusion: The optimized vehicle crash pulse at a single impact velocity is effective for reducing occupant deceleration in a crash at the specific impact velocity. However, the crash pulse does not necessarily lead to occupant deceleration reduction at a lower velocity. The optimized vehicle deceleration-deformation characteristics, which are effective for all impact velocities, depend on the weighting of the occupant injury measures at each impact velocity.

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Section: Discussionmentioning

confidence: 99%

Crash Pulse Optimization for Occupant Protection at Various Impact Velocities

Ito

Yokoi

Mizuno

2014

Traffic Injury Prevention

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“…3.1 AHOF400 indexes AHOF400 is the height of the average collision force when the displacement reaches 400mm in the process of vehicle collision [2]. The AHOF400 index is to control the vertical height of the front structure of the vehicle by calculating the average height of the load-cell when the displacement is 25mm to 400mm from the beginning of the collision.…”

Section: Full Width Deformable Barrier Test Evaluation Indexesmentioning

confidence: 99%

“…Based on the structure and geometric dimensions of the vehicle, the evaluation area is determined on the load-cell wall, and the homogeneity index calculation formula is as follows [2]:…”

Section: Homogeneity Indexesmentioning

confidence: 99%

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Study on evaluation indexes of the full width deformable barrier test

Yang,

Zhang

2023

AETR

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In order to evaluate the crash compatibility of vehicles, the full width deformable barrier is introduced into the vehicle crash test. Real car to car frontal collision is better simulated by installing deformable barrier on the load-cell wall . By the load-cell wall data, the values and distribution of vehicle frontal collision loads can be further obtained. Based on this, the full width deformable barrier tests are conducted for different structural sedans and SUV. The height index, homology index, horizontal structure interaction index(HSI), vertical structure interaction index(VSI), and minimum load-cell index are analyzed and compared. The results indicate that there is uncertainty when calculating the homology index RH and the evaluation indexes proposed by FIMCAR repeat the first step of VSI and HSI. Therefore, the height index, VSI, and HSI indexes are selected as effective indexes for evaluating the compatibility of the full width deformable barrier test.

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Development of a test equipment for rating front to rear-end collisions based on C-NCAP-2018

Song

Zhang³

et al. 2020

International Journal of Crashworthiness

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Development of compatibility assessments for full-width and offset frontal impact test procedures in FIMCAR

Cited by 3 publications

References 5 publications

Crash Pulse Optimization for Occupant Protection at Various Impact Velocities

Crash Pulse Optimization for Occupant Protection at Various Impact Velocities

Study on evaluation indexes of the full width deformable barrier test

Development of a test equipment for rating front to rear-end collisions based on C-NCAP-2018

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