The effect of lower limb muscle contractions on the impact acceleration behaviour of medial knee in low-speed pedestrian impact

Junghwa Hong, Sung Ki Min, Gwang Mun Eom, Byung Kyu Park, Soo Won Chae, Dong Suk Kim

Research output: Contribution to journalArticle

Abstract

For accurate analysis in low-speed collisions, roles of muscle in the low extremities are included in a finite element (FE) human model. The impact accelerations were estimated for vehicle-pedestrian collisions with and without muscle activations under 10 km/hour. The predicted acceleration at the medial knee was verified by the actual tests performed at 2.88 km/hour. Then, experiments were performed using a sled to obtain muscle activations, and impact accelerations of the subjects. More analyses were performed using the FE human model at 5 and 10 km/hour to understand effects of muscle activations on impact accelerations. At the lowest impact speed, the reduction of acceleration was 20% when the result with muscle activations was compared to that without muscle activations. The reduction was decreased to 12% at 5 km/hour. At 10 km/hour, the reduction was insignificant but existed to as much as 3%. Therefore, muscle activations in the lower limbs are important when the impact velocity is lower than 10 km/hour.

Original languageEnglish
Pages (from-to)359-373
Number of pages15
JournalInternational Journal of Vehicle Design
Volume51
Issue number3-4
DOIs
Publication statusPublished - 2009 Aug

Keywords

  • Human model
  • Impact acceleration at medial knee
  • Low-speed impact
  • MES
  • Muscle contraction
  • Myoelectric signal
  • Pedestrian accident

ASJC Scopus subject areas

  • Automotive Engineering
  • Mechanical Engineering

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