抗应力遮挡内固定钢板的有限元分析
作者：李林安 王志彬 辛景义 师宜健 邢晖
单位：李林安(天津大学，天津)；王志彬 辛景义 师宜健 邢晖(天津市中西医结合骨科研究所，天津 300211)
关键词：三维有限元；内固定钢板；生物力学
中国骨伤000604 摘 要：目的三维有限元法(FEM)适于内固定钢板和其改为中心外凸形状进行应力和变形分析。方法有限元分析中采用了1223个节点、764个八节点六面体等参元和3564个自由度。结果改进后的内固定钢板比原来的内固定钢板在正向力、弯矩My和Mz的作用下，柔度分别增加了60.1%、30.8%、61.2%。结论改进后的钢板刚度和应力替代作用被降低，符合生物力学。
Finite elemental analysis on the anti-stress shielding effect of the internal fixation plate
WANG Zhi-bin ,LI Lin-an ,XIN Jing-yi,et al.
(Orthopaedic Institute of Integrated Traditional Chinese and Western Medicine(Tianjing,300211))
Abstract：Objective Three dimensional finite element method(FEM)is suitable for the analysis of the stress and deformation of the internal fixation plate and its modified type of the centrally convex shape.Methods 1223 nodes,764 8-node hexahedron isoparametric elements and 3564 freedom degrees were used in FEM analysis.Results In comparison with the original steel plate,the flexibility of the improved steel plateunder the action of normal tensible load,y-direction and z-direction bending moment increased 60.1%,30.8% and 61.2% respectively.Conclusion Both the rigidity and the role of stress shielding decrease.The datademonstrates that this improved steel plate meets the demand of biomechanics.
Keywords：Finite element method Internal fixation steel plate Biomechanics
参考文献：
[1]谢贻权，何福保.弹性和塑性力学中的有限单元法.北京：机械工业出版社，1981.2-33.
[2]王小同，王志彬，师宜健，等.跟骨有限元计算和分析.生物医学工程杂志.1987,4(3):195-198.
[3]孟和，顾志华，主编.骨伤生物力学.北京：人民卫生出版社，1991.296.
收稿日期：1999-11-05, http://www.100md.com
单位：李林安(天津大学，天津)；王志彬 辛景义 师宜健 邢晖(天津市中西医结合骨科研究所，天津 300211)
关键词：三维有限元；内固定钢板；生物力学
中国骨伤000604 摘 要：目的三维有限元法(FEM)适于内固定钢板和其改为中心外凸形状进行应力和变形分析。方法有限元分析中采用了1223个节点、764个八节点六面体等参元和3564个自由度。结果改进后的内固定钢板比原来的内固定钢板在正向力、弯矩My和Mz的作用下，柔度分别增加了60.1%、30.8%、61.2%。结论改进后的钢板刚度和应力替代作用被降低，符合生物力学。
Finite elemental analysis on the anti-stress shielding effect of the internal fixation plate
WANG Zhi-bin ,LI Lin-an ,XIN Jing-yi,et al.
(Orthopaedic Institute of Integrated Traditional Chinese and Western Medicine(Tianjing,300211))
Abstract：Objective Three dimensional finite element method(FEM)is suitable for the analysis of the stress and deformation of the internal fixation plate and its modified type of the centrally convex shape.Methods 1223 nodes,764 8-node hexahedron isoparametric elements and 3564 freedom degrees were used in FEM analysis.Results In comparison with the original steel plate,the flexibility of the improved steel plateunder the action of normal tensible load,y-direction and z-direction bending moment increased 60.1%,30.8% and 61.2% respectively.Conclusion Both the rigidity and the role of stress shielding decrease.The datademonstrates that this improved steel plate meets the demand of biomechanics.
Keywords：Finite element method Internal fixation steel plate Biomechanics
参考文献：
[1]谢贻权，何福保.弹性和塑性力学中的有限单元法.北京：机械工业出版社，1981.2-33.
[2]王小同，王志彬，师宜健，等.跟骨有限元计算和分析.生物医学工程杂志.1987,4(3):195-198.
[3]孟和，顾志华，主编.骨伤生物力学.北京：人民卫生出版社，1991.296.
收稿日期：1999-11-05, http://www.100md.com