Bone structure prediction method suitable for periodical dynamic loads

A prediction method and technology of bone structure, applied in special data processing applications, instruments, electrical digital data processing, etc., to achieve theoretically reasonable results

Inactive Publication Date: 2018-11-06
DALIAN UNIVERSITY
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Problems solved by technology

Therefore, the current bone structure prediction algorithm has some defects from the perspective of mechanical principles

Method used

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  • Bone structure prediction method suitable for periodical dynamic loads
  • Bone structure prediction method suitable for periodical dynamic loads
  • Bone structure prediction method suitable for periodical dynamic loads

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Embodiment 1

[0037] This embodiment provides a bone structure prediction method suitable for periodic dynamic loads, which specifically includes the following steps:

[0038] Step 1. Select a 2mm×2mm square bone slice with a thickness of 0.1mm as the initial topology range for predicting the bone structure. The bottom end of the bone slice is restrained by a fixed hinge and one end is restrained by a living hinge. One day is used as the load spectrum period to determine the load size The number of levels and the number of cycles of each level of load, the square bone fragments are loaded on four sides, and the square bone fragments are divided into 40×40 four-node quadrilateral elements. figure 1 ;

[0039] Step 2: Define the initial apparent density of the bone structure as 0.8g / cm 3 ,Calculate the elastic modulus according to formula 1, take Poisson's ratio as 0.3, and define the material parameters of each element;

[0040] Step 3: Finite element analysis and solution;

[0041] Step 4: Extract...

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Abstract

The invention discloses a bone structure prediction method suitable for periodical dynamic loads. The method comprises the following steps of: 1, determining a topological range of a to-be-predicted bone structure; 2, carrying out modeling; 3, carrying out finite element grid partition; 4, calculating a material performance parameter elastic modulus of the bone and defining a material attribute for each unit; 5, loading a mechanical boundary condition and a load for a bone structure finite element model; 6, carrying out finite element analysis and solution on the bone structure; 7, extractinga main stress and a Mises stress of each unit of the bone structure finite element model; 8, calculating a fatigue life circle index according to stress values of each unit; 9, calculating mechanicalexcitation of each unit; and 10, calculating a performance density by applying a bone reconstruction control equation. According to the method, bone structure prediction is capable of embodying the bone function adaptability principle of bones which serve as a vital organ, and embodying the characteristic such as a main bearing period dynamic load of the bones.

Description

Technical field [0001] The invention relates to a bone structure prediction method, in particular to a bone structure prediction method suitable for periodic dynamic loads. Background technique [0002] Bone structure prediction (also known as bone reconstruction numerical simulation) is an important method for studying bone reconstruction theory, providing a theoretical basis for clinical prediction of bone density changes or prosthesis optimization design, and also helpful for the research and new development of various bone metabolic diseases Proposals for treatment of bone metabolism diseases. The bone structure prediction equation is a numerical realization algorithm of the adaptive principle of bone function of "grow as needed, absorb as needed". From an engineering point of view, it is an adaptive optimization design that uses bone as an engineering material. Therefore, the principle of bone function adaptability is also called the bone structure self-optimization theory...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/23G06F2119/06
Inventor 马宗民李淑娴吴蒙华王珍贾卫平张静莹
Owner DALIAN UNIVERSITY
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