@article{ref1,
title="Experimental and numerical considerations of helmet evaluation under oblique impact",
journal="Journal of transportation safety and security",
year="2020",
author="Bourdet, Nicolas and Deck, Caroline and Meyer, Frank and Willinger, Rémy",
volume="12",
number="1",
pages="52-65",
abstract="Based on real-world bicycle accident reconstructions and virtual accident simulations, the present study proposes realistic head-impact conditions in terms of oblique impact velocities. Thus, an existing bicycle helmet has been impacted frontally and laterally under oblique impacts with a Hybrid III dummy head fully instrumented for a 6D motion recording. The head acceleration curves were implemented in the Strasbourg University Finite Elements Head Model to assess the brain-injury risk in terms of intracerebral Von-Mises stress. <br><br>RESULTS of the experimental respectively numerical head response are expressed in terms of maximum linear and rotational accelerations, HIC, and brain-injury risk. <br><br>RESULTS show maximum linear acceleration of about 152g leading to HIC of 700. The maximum rotational head accelerations ranged from 5 to 12 krad/s², according to the rotation axis. The numerical head-injury risk assessment conducted to a risk of moderate DAI (Diffuse Axonal Injury) in the 27% to 70% range. These results demonstrated that the direction and time evolution of linear and rotational accelerations need to be taken account via the use of model-based head-injury criteria. This study is therefore a demonstrator for novel helmet test method as well as a step for advanced bicycle helmet design.<p /> <p>Language: en</p>",
language="en",
issn="1943-9962",
doi="10.1080/19439962.2019.1630695",
url="http://dx.doi.org/10.1080/19439962.2019.1630695"
}