[PDF] The Protective Performance of Modern Motorcycle Helmets Under Oblique Impacts | Semantic Scholar (2024)

The method introduced in this study can guide future accident reconstructions, allowing for the evaluation of TBI using the crash helmet only, and proved the hypothesis that the cyclist sustained a severe impact followed by a moderate impact on the road surface.

The results suggest that MoIs and CoF have significant effects on headform rotational kinematics, and consequently brain deformation, during the helmeted oblique impact.

This study used validated human multi-body models to predict the head impact location, speed and angle (measured from the ground) during trips, forward falls and backward falls, and found that most trips and forward falls lead to impact angles within the (30°, 60°] and (60°, 90°] groups while all backward falls produced impact angles inside the (0°, 30°] group.

The results confirm that the iMG can reliably measure laboratory-based head kinematics under a large range of accelerations and is suitable for future on-field validity assessments.

All traffic accidents that occurred continuously from 2017 to 2019 in which the motorcyclists were on at least one side of the collision based on inclusion criteria were analyzed.

The findings obtained from the simulation study showed a significant protective effect provided by the airbag, mitigating a multiple rib fracture scenario and reducing the risk of internal organ injuries for those falling from four meters of height or less.

Turbans' protection in cyclist head collisions is assessed and two directions for turban improvement are proposed: adding deformable materials within the turban layers to increase the impact duration and reduce the risk of bottoming out and reducing the friction between turban layers to reduce the transmission of rotational motion.

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Assessment of the brain injury prevention effects of 27 bicycle helmets in oblique impacts suggests that incorporating different impact locations in future oblique impact test methods and designing helmet technologies for the mitigation of head rotation in different planes are key to reducing brain injuries in bicycle accidents.

It was concluded that the areas most needing attention are: 1) expansion of the zone of protection at the front of the helmet and the inclusion of a test to minimise the transmission of the impact force from frontal blows to the base of the skull.

A test method, an oblique impact test, was used to compare two different helmet designs and it was shown that the strain in the FE model of the human head was reduced be 27% comparing the MIPS helmet to the glued helmet design.

This manuscript aims to investigate impact-induced injury mechanisms in different helmet fit scenarios through analysis of simulated helmeted impacts with an anthropometric test device, an array of headform acceleration transducers and neck force/moment transducers, a dual high speed camera system, and helmet-fit force sensors developed in the research group based on Bragg gratings in optical fiber.

The results showed that the ranking and rating are influenced by the choice of model and metric, and it is suggested that the biomechanics community should create a norm or recommendation for futureranking and rating methods.

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