一些与斜纹基粘弹性模拟椎骨组织相关的方面
Krzysztof Jankowski1, Marek Pawlikowski1, Katarzyna Barcz1
1Institute of Mechanics and Printing, Warsaw University of Technology, Warszawa, Poland.
Acta of bioengineering and biomechanics
|February 5, 2024
概括
孔尖的形状显著影响到椎骨的构成方程. 对于粘弹性模型,建议采用球形尖端,而维克斯尖端则适用于骨力学中的塑性变形分析.
科学领域:
- 生物机械工程 生物机械工程
- 材料科学 材料科学 材料科学
- 整形外科的研究研究.
背景情况:
- 脊椎骨表现出复杂的机械特性.
- 了解其构成性行为对于预测骨健康和衰竭至关重要.
- 沉测试是鉴定骨机制的一种常见方法.
研究的目的:
- 为了研究进口尖的几何如何影响椎骨的构成方程.
- 为了确定最佳的体形状,模拟骨机械反应的不同方面.
主要方法:
- 用Mooney-Rivlin超弹性模型将状骨样本建模为非线性粘弹性材料.
- 机械性能测试使用球形 (200微米直径) 和维克斯金字塔式内进行.
- 进行了加载/卸载测试,并没有在峰值力下保持20秒的时间.
主要成果:
- 构成模型准确地描述了穿刺骨在加载,保持和卸载阶段的行为.
- 粘弹性材料常数在入型之间显示出最小的变化.
- 纯弹性常数根据使用的形而有显著差异.
结论:
- 维克尔斯尖端缩模型不能完全捕捉到椎骨中的塑料残留变形.
- 为了建模粘弹性骨反应,使用与球形尖端数据校准的模型.
- 对于涉及潜在塑料变形的场景,使用维克斯尖端数据校准的模型更合适.
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