Development and validation of nonlinear finite element model of the whole lumbar spine
LING Qin-jie, LIN Hu, XIE Pu-sheng, DENG Yu-ping, HUANG Wen-hua
Chinese Journal of Clinical Anatomy ›› 2018, Vol. 36 ›› Issue (6) : 662-667.
Development and validation of nonlinear finite element model of the whole lumbar spine
Objective To develop the whole lumbar spine finite element model and to validate the model by comparison with the previous vitro experiments. results. Methods The CT images of the whole lumbar spine were from a 25 years old male volunteer. The finite element model was established by six software: Mimics 17.0, Geomagic Studio 2013, UG8.5, Hypermesh 13.0 and Abaqus 6.14-4. After finishing a grid convergence test, six lumbar movements (flexion, extension, left bending, right bending, left axial rotation, right axial rotation) were simulated by applying different moment loads to the model. Then the range of motion (ROM) of each lumbar spine functional spinal unit (FSU) was recorded. Results The simulating results obtained by the model were similar to those obtained from the in-vitro experiments, and the trend of the two was consistent. Conclusions The establishment and validation of the nonlinear finite element model of the whole lumbar spine used in this study can be used to model and analyze future spine-related diseases.
Lumbar spine / Biomechanics / Finite element analysis / Nonlinear Model
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