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Wear abrasive resistance of intracorporeal prosthesis of oesophagus

100%

Nowak A. J. , Dobrzański L. A.

tom Vol. 69, nr 1

26--32

Purpose: The main aim of the work is investigation of abrasive wear resistance of evaluated oesophageal prosthesis internal layer, considering its long-term exploitation possibility and extreme option of food consumed by patient after implementation. Design/methodology/approach: In the work, methodology of wear abrasive investigations of oesophageal prosthesis, made of long-fibre composite material based on medical silicon, internal surface is presented. The measurements have been done on equipment designed and made in Division of Materials Processing Technology, Management and Computer Techniques in Materials Science of Institute of Engineering Materials and Biomaterials. Findings: The volume of obtained samples mass loss have been determined from approximate calculations of wear trace to simple geometrical figure mapping this loss, ant then the volume of this figure haves been calculated. The CAD software has been used to verify approximation method, which allows to precisely determine mass loss. Research limitations/implications: Developed constructional model of modern, internal prosthesis of the human oesophagus will be used to design the manufacturing technology and to manufacture given prosthesis. Originality/value: Worked out construction is the part of the research project realized by authors, that will result in cognitive, constructional and technological effects, but first of all, it will enable the real help very sick people.

Zastosowanie metody elementów skończonych do modelowania wewnątrzustrojowej protezy przełyku

80%

Nowak A. J. , Dobrzański L. A. , Rybczyński R. , Mech R.

Przetwórstwo Tworzyw

2013

tom [R.] 19, nr 4 (154)

384--389

W pracy przedstawiono symulację komputerową wewnątrzustrojowej protezy przełyku, wykonanej z długowłóknistego materiału kompozytowego, z wykorzystaniem Metody Elementów Skończonych (MES). Modelowanie naprężeń wewnętrznych protezy wykonano w środowisku ANSYS Workbench. Dodatkowo w pracy przedstawiono zalety stosowania tego typu oprogramowania. Zastosowana MES pozwoliła na modelowanie naprężeń i odkształceń powstających w materiale kompozytowym, zarówno w warunkach odwzorowujących rzeczywiste badania doświadczalne, jak i w warunkach przybliżonych do panujących w organizmie człowieka po zaimplantowaniu protezy. Opracowana symulacja upraszcza oraz zmniejsza koszty optymalizacji własności wewnątrzustrojowej protezy przełyku przez symulację tych własności bez konieczności wykonywania dodatkowych badań laboratoryjnych.

The general topic of this paper is the computer simulation with the use of Finite Element Method (FEM) for determining the internal stresses in the internal oesophageal prosthesis based on long-fibre composite material. Modelling of stresses in the internal oesophageal prosthesis was performed with the help of FEM in ANSYS environment. Application of FEM was discussed and essential advantages resulting from application of it are pointed. Applied FEM enables modelling of stresses and deformations arises in composite material in the conditions representing real experimental investigations as well as condition similar of those prevailing in human body after prosthesis implementation. Developed simulation simplifies and reduces cost of optimization of the internal oesophageal prosthesis properties by simulation of this properties without necessity of additional laboratory investigations.

Finite Element Method application for modelling of internal oesophageal prosthesis

80%

Nowak A. , Dobrzański L. A. , Rybczyński R. , Mech R.

Archives of Materials Science and Engineering

2013

tom Vol. 64, nr 2

198--204

Purpose: The general topic of this paper is the computer simulation with the use of finite element method for determining the internal stresses in the internal oesophageal prosthesis based on long-fibre composite material. Design/methodology/approach: Modelling of stresses in the internal oesophageal prosthesis was performed with the help of finite element method in ANSYS environment. Application of Finite Element Method was discussed and essential advantages resulting from application of it are pointed Findings: The presented model meets the initial criteria, which gives ground to the assumption about its usability for determining the stresses in the internal oesophageal prosthesis, employing the finite element method using the ANSYS program. The computer simulation results correlate with the experimental results. Research limitations/implications: Applied Finite Element Method enables modelling of stresses and deformations arises in composite material in the conditions representing real experimental investigations as well as condition similar to those prevailing in human body after prosthesis implementation. Originality/value: Developed simulation simplifies and reduces cost of optimization of the internal oesophageal prosthesis properties by simulation of this properties without necessity of additional laboratory investigations.