Hybrid III Dummy Neck Issues

Kang, Jian; Nusholtz, Guy S.; Agaram, Venkatesh

doi:10.4271/2005-01-1704

Cited by 7 publications

(4 citation statements)

References 8 publications

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Section: Methodsmentioning

confidence: 99%

“…54 A non-directional neckform was used in lieu of the standard Hybrid III neckform to remove potential directional restrictions built into the original neckform that is designed for evaluating neck loads in car crash scenarios. 55,56 Finite element analysis Linear and angular headform accelerations were input into the University College Dublin Brain Trauma Model (UCDBTM) to approximate the intracranial strains associated with the physical loading conditions. The UCDBTM is a finite element model of the human brain, constructed using a computed tomography scan of a cadaver with material definitions consistent with the literature.…”

Section: Equipmentmentioning

confidence: 99%

See 1 more Smart Citation

Interaction of external head impact parameters on region and volume of strain for collisions in sport

Oeur

Gilchrist

Hoshizaki

2018

Proceedings of the Institution of Mechanical Engineers, Part P:

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Collisions with the head are the primary cause of concussion in contact sports. Head impacts can be further characterized by velocity, striking mass, compliance, and location (direction). The purpose of this study was to describe the interaction effects of these parameters on peak strain in four brain regions and the volume of strain for collision impacts. A pendulum test setup was used to deliver impacts to an adult Hybrid III headform according to four levels of mass (3, 9, 15, and 21 kg), four velocities (1.5, 3.0, 4.5, and 6.0 m/s), two impact locations (through the centre of gravity and a noncentre of gravity), and three levels of compliance simulating unprotected, helmeted, and well-padded conditions in sport. Headform accelerations were input into a brain finite element model to obtain peak strain in the frontal, temporal, parietal, and occipital lobes and the volume of the brain experiencing 0.10, 0.15, 0.20, and 0.25 strains. Centre-of-gravity impacts created the highest strains (peak and volume) under low compliance and non-centre-of-gravity impacts produced greater strain responses under medium and high compliance conditions. The temporal lobe was the region that consistently displayed the highest peak strains, which may be due to the proximity of the impact locations to this region. Interactions between mass and velocity displayed effects where the 9-kg mass had higher peak and volumes of strain than the 15-kg mass at velocities of 3.0 and 4.5 m/s. This study demonstrates the important role of interacting impact parameters on increasing strain responses that are relevant to the spectrum of diffuse brain injuries, including concussion.

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Section: Methodsmentioning

confidence: 99%

Section: Equipmentmentioning

confidence: 99%

Interaction of external head impact parameters on region and volume of strain for collisions in sport

Oeur

Gilchrist

Hoshizaki

2018

Proceedings of the Institution of Mechanical Engineers, Part P:

View full text Add to dashboard Cite

show abstract

“…Furthermore, to address potential accelerometer vibration (mounted in the cadaver's mouths using expanding foam), we employed a low-pass filter prior to injury assessments. Based on previous studies (Kang and Xiao, 2008;SAE, 1995) and in order to achieve a reasonable agreement between the predicted velocity changes during both vehicle and ground contact derived from differentiated video positions and integrated accelerometer curves (see Appendix H), we chose a CFC120 filter (3dB cut-off frequency = 200Hz), see Figure 4. With reference to Appendix H, a higher or lower cut-off threshold than 200Hz resulted in respectively over/ under-prediction of the velocity change compared to the video-based estimates.…”

Section: Pedestrian Kinematics During the Whole Process Of Vehicle Im...mentioning

confidence: 99%

Kinematics and dynamics of pedestrian head ground contact: A cadaver study

Shang

Masson²,

Teeling

et al. 2020

Safety Science

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“…The HIC value was employed to ascertain the crashworthiness of vehicles and the safety of passengers during the development of new cars [ 8 ]. Subsequently, the Hybrid III ATD was employed in a broader range of biomechanical testing, including the effects of gripping devices and airbag interactions [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

Additive Manufacturing of Head Surrogates for Evaluation of Protection in Sports

Mantecón,

Valverde-Marcos,

Rubio

et al. 2024

Polymers

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Head impacts are a major concern in contact sports and sports with high-speed mobility due to the prevalence of head trauma events and their dire consequences. Surrogates of human heads are required in laboratory testing to safely explore the efficacy of impact-mitigating mechanisms. This work proposes using polymer additive manufacturing technologies to obtain a substitute for the human skull to be filled with a silicone-based brain surrogate. This assembly was instrumentalized with an Inertial Measurement Unit. Its performance was compared to a standard Hybrid III head form in validation tests using commercial headgear. The tests involved impact velocities in a range centered around 5 m/s. The results show a reasonable homology between the head substitutes, with a disparity in the impact response within 20% between the proposed surrogate and the standard head form. The head surrogate herein developed can be easily adapted to other morphologies and will significantly decrease the cost of the laboratory testing of head protection equipment, all while ensuring the safety of the testing process.

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Hybrid III Dummy Neck Issues

Cited by 7 publications

References 8 publications

Interaction of external head impact parameters on region and volume of strain for collisions in sport

Interaction of external head impact parameters on region and volume of strain for collisions in sport

Kinematics and dynamics of pedestrian head ground contact: A cadaver study

Additive Manufacturing of Head Surrogates for Evaluation of Protection in Sports

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