Model for measuring mechanical properties of articular cartilage under action of physiological loads

A technology for articular cartilage and cartilage, applied in the field of biomedical engineering, can solve the problem of not considering the anisotropic characteristics of cartilage and physiological load conditions, etc.

Inactive Publication Date: 2013-12-11
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

These researchers basically regarded cartilage as a homogeneous body with the same Young's modulus, and performed some simple compression simul

Method used

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  • Model for measuring mechanical properties of articular cartilage under action of physiological loads
  • Model for measuring mechanical properties of articular cartilage under action of physiological loads
  • Model for measuring mechanical properties of articular cartilage under action of physiological loads

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Embodiment

[0016] A model for measuring the mechanical properties of articular cartilage under physiological loads, including a sliding compression model and a rolling compression model, wherein the sliding compression model, such as figure 1 As shown, it includes a sliding indenter 1a, a cartilage model 2, and a layered structure 3. The sliding indenter 1a is semicircular and can apply a certain amount of compression to compress the cartilage 2. The cartilage model 2 is composed of different layers of a layered structure 3; rolling Compression models such as figure 2 As shown, it includes a rolling indenter 1b, a cartilage model 2, and a layered structure 3. The rolling indenter 1b is circular and can compress the cartilage 2 by applying a certain amount of compression. The cartilage model 2 is composed of different layers of a layered structure 3; the cartilage model It is a two-dimensional cartilage model, which is established and divided into 3-9 layers by using the shell in ABAQUS....

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Abstract

The invention relates to a model for measuring the mechanical properties of an articular cartilage under the action of physiological loads. The model comprises a sliding compression model and a rolling compression model and is used for dividing the cartilage into different layer areas to perform the simulation of sliding compression and rolling compression, so that the various anisotropic characteristics and actual physical load conditions of the cartilage are considered. In addition, the functions of constituent components are considered by the combination of the tensile property of simulation collagen fibers of a spring unit in finite element software ABAQUS. The model is used for measuring the mechanical properties of the articular cartilage under the action of the physiological loads, and comprises sliding compression measurement and rolling compression measurement. The model has the advantages that the true stress environment of the articular cartilage is more truly simulated by the application of a finite element simulation method; and the functions of the constituent components of the cartilage are more truly simulated, so that the micro mechanical properties of the cartilage under the action of the physiological loads can be accurately simulated.

Description

technical field [0001] The invention mainly relates to the field of biomedical engineering, in particular to a model for measuring the mechanical properties of articular cartilage under physiological load. Background technique [0002] Articular cartilage is an important part of human knee joint movement, and plays an irreplaceable role in buffering shocks and transmitting loads. At present, due to the limitation of experimental conditions, it is difficult to test the microstructure and component changes of cartilage under physiological loads and the test of the real stress state. Therefore, many scholars use finite element simulation methods to explore the mechanical properties of cartilage. Mow et al first established a two-phase porous model of articular cartilage based on the two-phase porous medium theory of the mixture theory. The model consists of two intrinsically incompressible, immiscible solid matrices and a liquid, where the solid matrix is ​​regarded as a line...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 高丽兰刘志动张春秋
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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