Experimental-computational solution to fatigue induced microcrack source localization in cemented hip arthroplasty models

摘要

The present work examined the effects of signal velocity models, system equation damping, number of sensors, and system singularity on experimental-computational solutions to locate fatigue-induced microcracks in cemented total hip arthroplasty (THA). The following results were found. (1) Variable velocity model is a better approach for localizing microcracks in THA constructs. (2) The optimal range of system damping is between 0.001 and 0.002. (3) The rounding error of the final solution can be limited to the level of 10~(-2) when the numerical precision is taken to six decimal places for each element in the system matrix. In addition, proper use of system damping can reduce system singularity.