Design of the Elastic Modulus of porous lattice structures composed of cells with continuously variable cross section carrying structures

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-08-23 DOI:10.1016/j.clinbiomech.2024.106330

Pujun Hao , Jingna Liu , Chunqiu Zhang , Linwei Lyu

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Abstract

Background

Porous bone implants have a wide range of applications for their low elastic modulus and good connectivity. It is necessary to explore an elastic modulus control method that can significantly regulate the elastic modulus under the condition of maintaining a constant porosity.

Methods

For achieving continuously changing elastic modulus of porous lattice structure, the simple cubic lattice structures were selected as research object, and the distribution of cross-sectional sizes of its carrying structures were set as variable continuous curves. The prediction model for the elastic modulus was established based on the elasticity mechanics and the equal mass assumption. Then, the prediction model is enhanced through compression simulation of the unit cell structure. Finally, the accuracy of prediction model is validated by compression experiments.

Findings

The results indicate that the distribution of cross-sectional size of the carrying structures has a significant impact on the elastic modulus of unit cell structures under the constraint of equal mass. By adjusting the characteristic parameters of distribution curves, the elastic modulus can be changed within a large range.

Interpretation

Variable cross-section can effectively change the elastic modulus of porous structures while ensuring constant porosity. This method has important value in decoupling the influence of geometric parameters on the elastic modulus of porous structures.

Abstract Image

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由横截面连续可变的单元组成的多孔网格结构的弹性模量设计

背景多孔骨植入物因其弹性模量低、连接性好而应用广泛。方法为实现多孔晶格结构弹性模量的连续变化，选择简单立方晶格结构作为研究对象，并将其承载结构的截面尺寸分布设为可变连续曲线。基于弹性力学和等质量假设，建立了弹性模量的预测模型。然后，通过对单元格结构进行压缩模拟来增强预测模型。结果表明，在等质量约束条件下，承载结构截面尺寸的分布对单元格结构的弹性模量有显著影响。通过调整分布曲线的特征参数，可以在很大范围内改变弹性模量。这种方法在消除几何参数对多孔结构弹性模量的影响方面具有重要价值。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.