Abstract: Additive technologies have made it possible to make a significant breakthrough in the development and production of personalized porous implants, which have clear advantages over monolithic predecessors. At the same time, engineers are faced with a number of new tasks, one of which is correct and effective numerical modeling of porous implants in the process of solving optimization problems. The study compares approaches to numerical modeling of porous titanium for bone implants, taking into account differences in the mechanical parameters of the material and the geometry of the models. The detailed geometry of the structure of 9 models is considered, for which two variants of material parameters are specified: pure Ti6Al4V alloy and experimental ones obtained for specimens printed from Ti6Al4V powder. As a proposed approach to homogenizing the structure, a continuum model of a cylinder is considered, for which the experimental properties of the specimen’s material are specified. The numerically obtained values of Young's moduli for each approach are compared with those obtained in the experiment. It has been established that when setting the properties of a pure alloy, the calculated Young's modulus exceeds the experimental one by 83–92 %. The closest thing to experiment is detailed modeling of geometry with setting the experimental properties of the material structure, while the calculated Young's modulus does not exceed the experimental one by more than 10 %. However, in this case the calculation takes from 2 to 8 hours. In the case of continuum modeling, the calculated Young's moduli exceed the calculated moduli in detailed modeling by no more than 11 %, while the calculation lasts no more than 1 minute. Based on this, it is proposed to use a continuum approach to modeling implants in the process of calculating the optimization of their shape, as an initial iteration before detailed modeling of the structure. As material properties, it is necessary to use the mechanical parameters of the structures, previously obtained from uniaxial compression experiments. Using the properties of a pure alloy will lead to results that significantly exceed the actual ones when calculating the porous structure.

Cite: Fedorova N.V.
Comparison of finite element modeling approaches for Ti6Al4V porous bone implants
Russian Journal of Biomechanics. 2024. V.28. N1. P.57-65. DOI: 10.15593/rjbiomech/2024.1.05 Scopus РИНЦ OpenAlex

Original: Федорова Н.В.
Сравнение подходов численного моделирования пористых костных имплантатов из Ti-6Al-4V
Российский журнал биомеханики. 2024. Т.28. №1. С.67-76. DOI: 10.15593/RZhBiomeh/2024.1.05

Dates:

Submitted:	Feb 8, 2024
Accepted:	Mar 14, 2024
Published print:	Mar 29, 2024

Identifiers:

Scopus:	2-s2.0-85190311194
Elibrary:	67607737
OpenAlex:	W4398186686

Citing: Пока нет цитирований

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