有限元法
假体周围
材料科学
断裂(地质)
股骨骨折
结构工程
断裂力学
生物医学工程
复合材料
关节置换术
外科
股骨
工程类
医学
作者
Brad Miles,Elizabeth Kolos,William L. Walter,Richard Appleyard,Angela Shi,Qing Li,Andrew J. Ruys
标识
DOI:10.1016/j.medengphy.2015.03.012
摘要
Subject-specific finite element (FE) modeling methodology could predict peri-prosthetic femoral fracture (PFF) for cementless hip arthoplasty in the early postoperative period. This study develops methodology for subject-specific finite element modeling by using the element deactivation technique to simulate bone failure and validate with experimental testing, thereby predicting peri-prosthetic femoral fracture in the early postoperative period. Material assignments for biphasic and triphasic models were undertaken. Failure modeling with the element deactivation feature available in ABAQUS 6.9 was used to simulate a crack initiation and propagation in the bony tissue based upon a threshold of fracture strain. The crack mode for the biphasic models was very similar to the experimental testing crack mode, with a similar shape and path of the crack. The fracture load is sensitive to the friction coefficient at the implant-bony interface. The development of a novel technique to simulate bone failure by element deactivation of subject-specific finite element models could aid prediction of fracture load in addition to fracture risk characterization for PFF.
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