Fundamental Study of Dynamic Analysis of Lumbar Vertebrae View Full Text


Ontology type: schema:Chapter     


Chapter Info

DATE

2000

AUTHORS

Hidekazu Nishigaki , Tatuyuki Amago , Kazuo Miki , Shin-ichi Ishiyama , Eiichi Tanaka , Sota Yamamoto

ABSTRACT

This paper describes the results of fundamental study of dynamic analysis of the lumbar vertebrae for the accidental injury. A finite element model with linear brick elements and nonlinear truss elements is constructed for the study of dynamic responses of the fifth and fourth lumbar vertebrae. The results of the analyses show the folio wings: In case of the estimation of the global behavior of vertebrae, it is efficient method to treat the stiff parts of the bone as rigid elements and apply the 8-points integration to the other soft brick elements. To determine the stiffness of ligament for various modeling cases, response surface methodology using design of experiment is applied and the usefulness is verified. And this design of experiment is also applied to examine the influence of the disk properties on the lumbar vertebral stiffness. This bending stiffness of the lumbar vertebrae is rapidly increasing when Poisson’s ratio of nucleus pulposus is very close to 0.5. If Poisson’s ratio is close to 0.5, nucleus pulposus changes its characteristic from compressible to incompressible. In this case, the disk is expected to function as rotator in the extension or flexion of the lumbar vertebrae. To verify this function of rotator, the impact response analyses that dropped block comes into contact with the upper side of the lumbar vertebrae is performed and this function is verified quantitatively. More... »

PAGES

243-248

Book

TITLE

Human Biomechanics and Injury Prevention

ISBN

978-4-431-66969-2
978-4-431-66967-8

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/978-4-431-66967-8_33

DOI

http://dx.doi.org/10.1007/978-4-431-66967-8_33

DIMENSIONS

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