Nunez Vallejos D., Bernal A., Mauledoux M., Aviles O., 2017, Analysis of Mechanical Behavior of a Device Made of Poly L Lactide Acid for Reconstruction of Phalanx Fracture, Chemical Engineering Transactions, 57, 1357-1362.
The phalanx-biomedical device is studied in a finite element analysis software and simulations varying load were carried out. The aim of the research is to describe the mechanical behavior of a device to repair phalanx fracture made of poly-L-lactide acid. Tensile and relaxation behaviors of the polymer are determined and a rheological model is developed as well as the fracture phalanx joined with a polymer device using computer- aided design software. Results indicate that the rheological model with two Neo-Hookean networks in a parallel distribution generates a fit of 98 %. After the analysis of different loads, there is a major relation between time, slope and permissible load time. The stress associated with change in geometry owing to the holes in the bone is the principle cause of biomedical device failure. The Von Mises stresses were more than 3.2 times yield stress for all simulations except with the lowest load. As conclusion, the use of finite element analysis avoids destructive tests and reduces resources. In addition, a mathematical description of the mechanical behavior of the poly-L-lactide acid is accomplished by using a Parallel Network Model.
