Fracture accuracy on cortical bone structure under bending load using different numerical methods
- VernacularTitle:不同数值方法模拟皮质骨结构弯曲断裂的准确性
- Author:
Ruoxun FAN
1
,
2
;
Jie LIU
;
Zhengbin JIA
Author Information
- Keywords: cortical bone; fracture simulation; element instantaneous failure; continuum damage mechanics; extended finite element
- From: Chinese Journal of Tissue Engineering Research 2024;28(12):1895-1900
- CountryChina
- Language:Chinese
- Abstract: BACKGROUND:Current fracture simulation for cortical bone structure is mainly based on three numerical methods:the element instantaneous failure,continuum damage mechanics,and extended finite element methods.Although many studies focus on cortical bone fracture simulation,few have compared the differences in prediction accuracy using the three numerical methods. OBJECTIVE:To probe the accuracy and applicability of the three numerical methods in simulating cortical bone fracture under bending load. METHODS:The rat femur samples were primarily used to perform the three-point bending experiment.The rat femoral finite element models were established based on the micro-CT images of the femur samples and the three numerical methods were used to conduct the fracture simulations under three-point bending loads.The predicted fracture loads and fracture patterns were compared with the experimental data to determine the accuracy of various numerical methods in simulating cortical bone fracture. RESULTS AND CONCLUSION:(1)The discernible differences in the failure processes could be observed in the same finite element model under the three numerical simulations due to different element failure strategies.(2)The simulation results showed that the fracture simulation using the continuum damage mechanics method was in better agreement with the experimental results.(3)The numerical method that was suitable for simulating cortical bone fracture under bending load could be determined by comparing it with experimental results.The variations in the fracture parameters were observed,and the reason for the differences in the predicted results using different numerical methods was also discussed,which aided in determining the range of applicability of structural fracture simulation for each numerical method and then improving the simulation accuracy.
