Artificial cardiac valve and performance analysis method based on ANSYS/LS-DYNA thereof

Abstract

The invention discloses an artificial cardiac valve. The thickness of the artificial cardiac valve ranges from 0.4mm to 0.6mm. A modeling equation of the curve face of the artificial cardiac valve is one the following four equations: 1 a round spherical face model parameter equation, 2 a cylindrical face model parameter equation, 3 a rotation paraboloid model parameter equation and 4 an ellipsoid model parameter equation, wherein x, y and z respectively represent a horizontal ordinate, a vertical ordinate and a longitudinal ordinate of a curve space ordinate, and alpha represents a conical inclined angle and is 3 degrees. The invention further discloses a performance analysis method based on ANSYS/LS-DYNA of the artificial cardiac valve and establishes a fluid-solid coupling model of the biological valve prosthesis so as to lay the foundation for fluid-solid coupling of the biological valve prosthesis. The artificial cardiac valve and the performance analysis method based on ANSYS/LS-DYNA of the artificial cardiac valve analyze and compare the four models according to bionics and the principle of the largest opening area and with the combination of bionic theory, the conclusion is obtained: a round spherical face cardiac valve has the best performance, so that powerful basis is provided for the research and optimization of the biological cardiac valves.

Description

technical field [0001] The invention relates to an artificial heart valve and a modeled performance analysis method based on ANSYS / LS-DYNA. Background technique [0002] Currently, for patients with severe heart valve disease, surgical replacement of the artificial valve is ultimately the only effective treatment. Since the biological valve was first implanted in the human body in 1965, it has been widely used in clinical practice due to its excellent biocompatibility and central flow path compared with mechanical valves. , compatibility with the body, and durability of valve function have reached an acceptable level, but they have not yet reached the ideal standard of human natural heart valves, so all kinds of artificial heart valves currently in use need further research Most scholars believe that tissue calcification and valve leaflet tearing are the main forms of failure of biological valves, and mechanical stress is the main factor causing tissue calcification and val...

AI Technical Summary

Problems solved by technology

Since the biological valve was first implanted in the human body in 1965, it has been widely used in clinical practice due to its excellent biocompatibility and central flow path compared with mechanical valves. , compatibility with the body, and durability of valve function have reached an acceptable level, but they have not yet reached the ideal standard of human natural heart valves, so all kinds of artificial heart valves currently in use need further research Most scholars believe that tissue calcification and valve leaflet tearing are the main forms of biological valve failure, and mechanical stress is the main factor causing tissue calcification and valve leaflet tearing

However, due to the working environment of the valve and the uniqueness of the material properties of the valve leaflet, it is difficult to measure the internal stress distribution of the valve leaflet after calcification, so there is no scientific data basis for the analysis of the valve leaflet durability.

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