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- W3208283491 abstract "In most finite element computational studies, only the articulating bodies (acetabular cup and femoral head) of hip arthroplasty have been considered for wear prediction. However, limited studies have also been done for predicting wear in the stem and head interface. Various studies have addressed the problems raised due to the wear debris formation in the stem and head interface, such as inflammatory reaction in the tissues and further progression towards necrosis or osteolysis. In this context, this finite element study aimed to investigate the wear behaviour between stem and head interface of hip arthroplasty using modified Archard's wear model utilizing contact pressure, sliding distance, and wear coefficient (obtained from previous studies). The study considered three stem-head material combinations, namely CoCrMo-Alumina, Ti6Al4V-Alumina, and CoCrMo-Ti6Al4V, for predicting the wear rate under sit-down, stand-up, and stance gait activities. Further, the fatigue behaviour and average life cycles for different gait activities were also predicted using Goodman's mean stress fatigue theory. The study concluded to have minimum wear rate developed in the CoCrMo-Alumina model in sit-down gait activity. All the prepared models showed an average life span of 1.00E + 07 (10 million) cycles before failure in different gait activities while maintained significant safety factors to avoid fatigue failure. The equivalent von-mises stresses were within yield strengths of related materials and while the Ti6Al4V-Alumina model in sit down activity showed the lowest equivalent von-mises stresses." @default.
- W3208283491 created "2021-11-08" @default.
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- W3208283491 date "2021-10-01" @default.
- W3208283491 modified "2023-09-23" @default.
- W3208283491 title "Wear and fatigue behaviour investigation of hip implant head-stem interface using finite element analysis" @default.
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- W3208283491 doi "https://doi.org/10.1016/j.matpr.2021.10.188" @default.
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