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The biomechanical differences of shock absorption test methods in the US and European helmet standards
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Biomedical Engineering and Health Systems, Neuronic Engineering.
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Biomedical Engineering and Health Systems, Neuronic Engineering.ORCID iD: 0000-0003-0125-0784
KTH.
2019 (English)In: International Journal of Crashworthiness, ISSN 1358-8265, E-ISSN 1754-2111, Vol. 24, no 4, p. 399-412Article in journal (Refereed) Published
Abstract [en]

Nowadays crash helmets are tested by dropping a free or unrestrained headform in Europe but a guided or restrained headform in the United States. It remains unclear whether the free fall and the guided fall produce similar impact kinematics that cause head injury. A ?nite element helmet model is developed and compared with experimental tests. The resulting head kinematics from virtual tests are input for a ?nite element head model to compute the brain tissue strain. The guided fall produces higher peak force and linear acceleration than the free fall. Eccentric impact in the free fall test induces angular head motion which directs some of the impact energy into rotational kinetic energy. Consequently, the brain tissue strain in the free fall test is up to 6.3 times more than that in the guided fall. This study recommends a supplemental procedure that records angular head motion in the free fall test.

Place, publisher, year, edition, pages
Taylor & Francis Group, 2019. Vol. 24, no 4, p. 399-412
National Category
Vehicle Engineering
Identifiers
URN: urn:nbn:se:kth:diva-252954DOI: 10.1080/13588265.2018.1464545ISI: 000468457900004Scopus ID: 2-s2.0-85046630058OAI: oai:DiVA.org:kth-252954DiVA, id: diva2:1340236
Note

QC 20190802

Available from: 2019-08-02 Created: 2019-08-02 Last updated: 2019-08-02Bibliographically approved

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Meng, ShiyangKleiven, SveinHalldin, Peter

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CiteExportLink to record
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  • apa
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