ANSYS疲劳分析在接骨板选型评估中的应用

目的 通过对比股骨远端接骨板中A型、B型锁定加压接骨板(locking compression plate, LCP)的疲劳强度，为测试其弯曲强度及疲劳性能时对接骨板选型提供理论评估方法。方法 通过对不同类型接骨板进行弯曲强度性能测试与疲劳性能测试，再结合ANSYS Workbench对接骨板总变形、von Mises应力及疲劳使用寿命进行有限元分析。结果 A型接骨板疲劳强度比B型接骨板高30.7%,A型接骨板应力比B型接骨板要低，A型接骨板最低疲劳使用寿命比B型接骨板要高17%。结论 A型接骨板的疲劳性能比B型接骨板良好，故A型接骨板的失效可能性比B型接骨板的可能性要低。研究结果为测试新研发的两种接骨板各种性能时对不同接骨板选型辅助提供参考。

Application of ANSYS Fatigue Analysis in Type Selection and Evaluation of Bone Plate

Objective By comparing the fatigue strength of type A and type B locking compression plates (LCP) in distal femoral plate, a theoretical evaluation method was provided for type selection of bone plate when testing its bending strength and fatigue performance. Methods Through bending strength performance test and fatigue performance test on bone plates with different types, combined with ANSYS Workbench, the finite element analysis on total deformation, von Mises stress and fatigue service life of bone plates were conducted. Results The fatigue strength of type A plate was 30.7% higher than that of type B plate, the stress of type A plate was lower than that of type B plate, and the minimum fatigue service life of type A plate was 17% higher than that of type B plate. Conclusions The fatigue performance of type A plate is better than that of type B plate, so the failure possibility of type A plate was lower than that of type B plate.The results provide references for assisting selection of different bone plates when testing the performance of two newly developed bone plates.