Dynamic finite element analysis of impulsive stress waves propagating from the greater trochanter of the femur by a sideways fall

Takaaki Sarai, Akihiro Tokumoto

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Fall accidents are a common cause of femoral fracture in the elderly. The greater trochanter of the femur is often subjected to impact loading by a sideways fall, and thus it is worth studying the impulsive stress waves propagating in the femur. In this study, the impulsive stress was analyzed by the dynamic finite element method using a 3-dimensional model of the femur, and the influence of the fall configuration on the stress was discussed. The stress was concentrated around the femoral neck during the propagation of the stress wave, and the tensile maximum principal stress changed into compressive minimum principle stress on the anterior and medial sides of the neck. On the other hand, the compressive minimum principal stress changed into tensile maximum principle stress on the lateral side of the neck. The largest maximum principal stress during the impact loading was always larger in the neck than in the impact region. The largest absolute value of the minimum principal stress was found in the neck or the impact region depending on the fall configuration The largest absolute values of the maximum and minimum principal stress were nearly equal, indicating that the bone fracture due to the tensile stress may occur around the femoral neck.

Original languageEnglish
Pages (from-to)165-171
Number of pages7
JournalActa Medica Okayama
Volume69
Issue number3
Publication statusPublished - 2015

Fingerprint

Finite Element Analysis
Femur
Neck
Finite element method
Femur Neck
Femoral Fractures
Bone Fractures
Accidents
Maximum principle
Tensile stress
Bone

Keywords

  • Biomechanics
  • Femoral neck
  • Greater trochanter
  • Impulsive stress wave
  • Sideways fall

ASJC Scopus subject areas

  • Medicine(all)
  • Biochemistry, Genetics and Molecular Biology(all)

Cite this

Dynamic finite element analysis of impulsive stress waves propagating from the greater trochanter of the femur by a sideways fall. / Sarai, Takaaki; Tokumoto, Akihiro.

In: Acta Medica Okayama, Vol. 69, No. 3, 2015, p. 165-171.

Research output: Contribution to journalArticle

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