Systems identification for material properties of the intervertebral joint

H. S. Lin, Y. King Lui, Gautam Ray, Parviz E Nikravesh

Research output: Contribution to journalArticle

74 Citations (Scopus)

Abstract

An identification of the elastic solid properties of the intervertebral disc was achieved by the finite element method utilizing experimental data from the axial loading of a lumbar intervertebral joint. By assuming orthotropic material properties for the vertebra and disc, a 3-D finite element model resembling the test specimens was constructed and exercised. The model deformations were then compared to the experimental measurements and an initial correlation found between them. Finally, using an efficient optimization scheme, the overall material constants of the disc were optimally determined by minimizing the error between the experimental data and the predicted deformations from the finite element analysis. The material constants thus identified show the orthotropic elastic moduli of the lumbar intervertebral disc to be independent of segment level but decrease directly as a function of the severity of degeneration.

Original languageEnglish (US)
JournalJournal of Biomechanics
Volume11
Issue number1-2
DOIs
StatePublished - 1978
Externally publishedYes

Fingerprint

Intervertebral Disc
Materials properties
Identification (control systems)
Joints
Finite element method
Finite Element Analysis
Elastic Modulus
Weight-Bearing
Spine
Elastic moduli

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine

Cite this

Systems identification for material properties of the intervertebral joint. / Lin, H. S.; King Lui, Y.; Ray, Gautam; Nikravesh, Parviz E.

In: Journal of Biomechanics, Vol. 11, No. 1-2, 1978.

Research output: Contribution to journalArticle

@article{db4b7489ec6e4be1b21c81dc7228c193,
title = "Systems identification for material properties of the intervertebral joint",
abstract = "An identification of the elastic solid properties of the intervertebral disc was achieved by the finite element method utilizing experimental data from the axial loading of a lumbar intervertebral joint. By assuming orthotropic material properties for the vertebra and disc, a 3-D finite element model resembling the test specimens was constructed and exercised. The model deformations were then compared to the experimental measurements and an initial correlation found between them. Finally, using an efficient optimization scheme, the overall material constants of the disc were optimally determined by minimizing the error between the experimental data and the predicted deformations from the finite element analysis. The material constants thus identified show the orthotropic elastic moduli of the lumbar intervertebral disc to be independent of segment level but decrease directly as a function of the severity of degeneration.",
author = "Lin, {H. S.} and {King Lui}, Y. and Gautam Ray and Nikravesh, {Parviz E}",
year = "1978",
doi = "10.1016/0021-9290(78)90038-6",
language = "English (US)",
volume = "11",
journal = "Journal of Biomechanics",
issn = "0021-9290",
publisher = "Elsevier Limited",
number = "1-2",

}

TY - JOUR

T1 - Systems identification for material properties of the intervertebral joint

AU - Lin, H. S.

AU - King Lui, Y.

AU - Ray, Gautam

AU - Nikravesh, Parviz E

PY - 1978

Y1 - 1978

N2 - An identification of the elastic solid properties of the intervertebral disc was achieved by the finite element method utilizing experimental data from the axial loading of a lumbar intervertebral joint. By assuming orthotropic material properties for the vertebra and disc, a 3-D finite element model resembling the test specimens was constructed and exercised. The model deformations were then compared to the experimental measurements and an initial correlation found between them. Finally, using an efficient optimization scheme, the overall material constants of the disc were optimally determined by minimizing the error between the experimental data and the predicted deformations from the finite element analysis. The material constants thus identified show the orthotropic elastic moduli of the lumbar intervertebral disc to be independent of segment level but decrease directly as a function of the severity of degeneration.

AB - An identification of the elastic solid properties of the intervertebral disc was achieved by the finite element method utilizing experimental data from the axial loading of a lumbar intervertebral joint. By assuming orthotropic material properties for the vertebra and disc, a 3-D finite element model resembling the test specimens was constructed and exercised. The model deformations were then compared to the experimental measurements and an initial correlation found between them. Finally, using an efficient optimization scheme, the overall material constants of the disc were optimally determined by minimizing the error between the experimental data and the predicted deformations from the finite element analysis. The material constants thus identified show the orthotropic elastic moduli of the lumbar intervertebral disc to be independent of segment level but decrease directly as a function of the severity of degeneration.

UR - http://www.scopus.com/inward/record.url?scp=0017883313&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0017883313&partnerID=8YFLogxK

U2 - 10.1016/0021-9290(78)90038-6

DO - 10.1016/0021-9290(78)90038-6

M3 - Article

C2 - 659451

AN - SCOPUS:0017883313

VL - 11

JO - Journal of Biomechanics

JF - Journal of Biomechanics

SN - 0021-9290

IS - 1-2

ER -