Modelling of the mechanical behavior of a polyurethane finger interphalangeal joint endoprosthesis after surface modification by ion implantation

Beliaev, Anton Y.; Свистков, А. Л.; Изюмов, Р И; Осоргина, И. В.; Kondyurin, Alexey; Bilek, M.M.M.; McKenzie, David R.

doi:10.1088/1757-899x/123/1/012001

Cited by 12 publications

(9 citation statements)

References 3 publications

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“…The frequency and strain were selected from considerations of possible real exploitation conditions of the implants. The lowest value of strain was fixed at 10% due to residual deformations of the polymers, and the highest corresponds to the estimated maximal deformation of interphalangeal joint endoprosthesis [22]. The samples were remained preloaded to deformation of 2%, 5% or 10%, respectively to prevent bending of the samples due to residual strain.…”

Section: Mechanical Fatigue Testsmentioning

confidence: 99%

The Fracture of Plasma-Treated Polyurethane Surface under Fatigue Loading

et al. 2018

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Plasma treatment of soft polymers is a promising technique to improve biomedical properties of the materials. The response to the deformation of such materials is not yet clear. Soft elastic polyurethane treated with plasma immersion ion implantation is subjected to fatigue uniaxial loading. The influence of the strain amplitude and the plasma treatment regime on damage character is discussed. Surface defects are studied in unloaded and stretched states of the material. As a result of fatigue loading, transverse cracks (with closed overlapping edges as well as with open edges deeply propagating into the polymer) and longitudinal folds which are break and bend inward, appear on the surface. Hard edges of cracks cut the soft polymer which is squeezed from the bulk to the surface. The observed damages are related to the high stiffness of the modified surface and its transition to the polymer substrate.

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Section: Mechanical Fatigue Testsmentioning

confidence: 99%

The Fracture of Plasma-Treated Polyurethane Surface under Fatigue Loading

et al. 2018

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“…Equation (5) gives the solution ΔT (t). Thus we obtain an average value of the temperature over the thickness of the sample depending on the time.…”

Section: The Wave-surface Appearing Temperature Mechanismmentioning

confidence: 99%

“…Mathematical models will help to understand the processes taking place in the system under consideration [2,3]. Together with mechanical tests this will enable to develop and optimize the type of implant [4,5] which is necessary to solve the problem. In this paper we consider the simulation of the processes occurring during ion-plasma treatment of polyurethane and the formation of a special carbonized layer on its surface.…”

Section: Introductionmentioning

confidence: 99%

Mechanisms Influencing the Formation of the Carbonized Layer Relief on the Polymer Surface after the Ion-Plasma Treatment Modeling

Belyaev

Свистков

2018

MSF

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The work is devoted to modeling of the processes occurring in ion-plasma treatment of polyurethane and forming on its surface a special carbonized layer. The mechanisms affecting the formation of wave-like relief in the carbonized layer are examined. The boundary value problem for the heat equation for modeling the effect of temperature component was solved. Using the finite element method the deformation of the polyurethane sample during ion-plasma treatment was calculated. On the basis of calculations conclusion about the impact of these factors on the formation of wave-like relief in the carbonized layer was made.

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“…Упругие полимеры незаменимы там, где требуются большие деформации. В частности, полиуретановые эластомеры используются в биомедицинских целях для изготовления грудных имплантов [1], межфаланговых протезов [3], катетеров [5]. Модификация этих изделий плазмой могла бы существенно улучшить их биомедицинские характеристики.…”

Section: Introductionunclassified