Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Repeated low impacts in alpine ski helmets
Mittuniversitetet, Avdelningen för hälsovetenskap.
Mittuniversitetet, Avdelningen för hälsovetenskap.ORCID iD: 0000-0002-3814-6246
Department of Mechanics, Royal Institute of Technology, Stockholm, Sweden.
2013 (English)In: Sports Technology, ISSN 1934-6182, E-ISSN 1934-6190, Vol. 6, no 1, p. 43-52Article in journal (Refereed) Published
Abstract [en]

Alpine ski race helmets are subjected to multiple impacts during a race caused by the skiers hitting the gates on their way down the course. This study investigated the difference between expanded polystyrene (EPS) and expanded polypropylene (EPP) cores in alpine ski race helmets when subjected to repetitive violence, caused by alpine slalom gates. A special test rig was developed where a rotating slalom pole impacted the helmets with a velocity of 13.3 m·s− 1. All helmets (six EPS and six EPP) were attached to a headform, monitored with a triaxial accelerometer at the center of mass. Each helmet sustained 1000 impacts and acceleration data were collected around every 200 impacts. No significant differences were observed between the first hit and after 1000 hits for either the EPS or the EPP helmets. However, the total group mean acceleration and mean peak acceleration were 15% and 16% higher, respectively, for the EPS series compared with the EPP series. Also, all EPS helmets showed cracked cores after 1000 impacts compared with 1 cracked EPP core. Findings suggest that EPP cores might be more suitable for absorbing multiple low impacts caused by alpine gates and that repeated violence is a relevant parameter to consider when constructing alpine ski race helmets.

Place, publisher, year, edition, pages
2013. Vol. 6, no 1, p. 43-52
Keywords [en]
alpine skiing, head acceleration, multiple impacts
National Category
Other Mechanical Engineering Sport and Fitness Sciences
Identifiers
URN: urn:nbn:se:ltu:diva-84425DOI: 10.1080/19346182.2012.744413Scopus ID: 2-s2.0-84893933854OAI: oai:DiVA.org:ltu-84425DiVA, id: diva2:1555825
Note

Publ online nov 2012

Available from: 2012-11-23 Created: 2021-05-19 Last updated: 2021-05-19Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full textScopus

Authority records

Swarén, MikaelHolmberg, Hans-Christer

Search in DiVA

By author/editor
Swarén, MikaelHolmberg, Hans-Christer
In the same journal
Sports Technology
Other Mechanical EngineeringSport and Fitness Sciences

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 16 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf