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Application of Stiffness Matrix Element for Finite Element Analysis of Spine  

정일섭 (영남대학교 기계공학부)
안면환 (영남대학교 의과대학 정형외과)
Publication Information
Journal of the Korean Society for Precision Engineering / v.20, no.10, 2003 , pp. 226-232 More about this Journal
Abstract
Difficulties in the finite element modeling of human spine are evaded by using a stiffness matrix element whose properties can be characterized from experimentally measured stiffness of functional spinal units. Relative easiness is in that inter-vertebral discs, ligaments, and soft tissues connecting vertebrae do not need to be modeled as they are. The remarkable coupling effect between distinct degrees of freedom induced by the geometric complexity can be accommodated without much effort. An idealized block model with simple geometry for vertebra is employed to assess the feasibility of this method. Analyses are performed in both levels of motion segment and spinal column, and the result is compared with that from detail model. As far as the global behavior of spine is concerned, the simplification is found not to aggravate inaccuracy only if sufficient experimental data is provided and interpreted properly.
Keywords
Spine; Motion segment; Finite element method; Stiffness matrix element;
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Times Cited By KSCI : 1  (Citation Analysis)
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