摘要
目的建立髌骨三维有限元模型，并对所建模型做出初步力学分析。方法根据螺旋CT扫描图像，利用ANSYS有限元软件由下向上点、线、面、体的建模原则，对髌骨三维有限元模型进行重建；并在重建基础上模拟髌骨受力机制，分析其应力大小和应力分希睛况。结果对髌骨进行有限元分析，结果显示应力集中区分布在髌骨的中下极，说明骨折的好发部位即在髌骨的中下极；张力侧Vonmisesstress值明显大于应力侧。结论建立了髌骨有限元模型，该模型能逼真地反映髌骨真实几何结构，与临床基本相符。
Objective To build a three-dimension finite-element model of patella and to make a preliminary mechanics analysis on the model. Methods According to the model-building principle of Ansys software which started from point to line to area to volume, a three-dimension finite-element patella model was reconstructed on the basis of the images of spiral CT. Then, loading on the model patella were simulated and the stress magnitude and distribution on the patella were analyzed. Results Finite element analysis of the patella showed that stress concentration zone located in the middle and lower patella, indicating that fracture predilection sites in the lower patellar. The Von mises stress on the tension side was significantly greater than that on pressure side. Conclusion The established finite element model of the patella can reflect the real geometry of patella treated in clinics.
出处
《国际生物医学工程杂志》
CAS
北大核心
2011年第2期94-97,F0003,共5页
International Journal of Biomedical Engineering
关键词
髌骨
有限元
三维重建
Patella
Finite-element
Three-dimension reconstruction
