缺损软骨在滚压载荷下的实验与有限元分析

Experiment and finite element analysis of articular cartilage under rolling load

研究了缺损软骨在滚压载荷下的应变场分布,验证有限元数值模拟的准确性。分别通过实验和有限元仿真,对软骨缺损附近应变进行对比分析。比较实验云图与仿真云图看出,在软骨伤口附近的应变较大,远离伤口的部位应变分布均匀;从应变曲线的实验结果和仿真结果对比得出,无论在伤口附近表层或伤口底部,实验与仿真结果基本一致。滚压载荷下缺损对软骨力学性能有一定影响,有限元仿真结果与实验结果基本符合,说明有限元仿真数据具有可靠性。

To study the strain distribution of the micro-defect cartilage under rolling load and to verify the accuracy of the numerical simulation. The strain around the defect were compared and analyzed with the methods of experiment and finite element simulation. Compared to other location, it was observed that the strain around the defect was larger, but the strain away from the defect was evenly distributed. Comparing the strain curve of experiment and simulation, it could be found the results were basically consistent regardless of in surface or bottom of the defect. The defect had dis- tinct effects on mechanical properties of the cartilage under rolling load, and simulation results were approximately consistent with the experiment, meanwhile, it also made the reliability of simulation data demonstrated.