中文摘要：

人工髋关节置换手术是利用机械性能和生物相容性良好的材料制成类似人体骨关节的假体,然后把其置换到被破坏的关节面。它可以缓解甚至消除病痛,有效地维持关节的稳定性和自由度,从而恢复关节的正常性能。利用有限元法建立人工髋关节股骨柄的三维有限元模型,以探讨不同材料股骨柄假体的疲劳性能,从而确保髋关节置换假体的安全性及可靠性。计算获得了两种不同金属材料髋关节假体的疲劳性能,包括假体的寿命、变形等结果。钛合金假体的使用寿命最小为568万次,满足ISO标准。而不锈钢材料则不适合作为假体材料。

英文摘要：

Total hip replacement（THR）is replacing the prosthesis stem similar to human bone that takes advantage of the material with both good mechanical properties and biocompatibility to the damaged articular surface.Thus it can not only alleviate or even eliminate the pain but also effectively maintain the joint stability and freedom and restore its normal performance.Finite element analysis was used in this study to establish a 3D model of artificial hip stem,and explore its fatigue properties of different materials to ensure the safety and reliability.The calculating obtained two results of different metal hip prosthesis,including lifetime and deformation.The minimum service life of titanium prosthesis reaches 568 million times,which satisfies ISO standards,while the stainless steel does not suit to be a prosthesis material.