探索叶片骨的层次结构及其对骨折行为的影响:使用相场损伤模型进行计算研究
Hamid Alijani1, Ted J Vaughan1
1Biomechanics Research Centre (BioMEC), Biomedical Engineering, School of Engineering, College of Science and Engineering, University of Galway, Ireland.
概括
血小板状的骨矿物质比颗粒状的骨矿物质更加强骨折性. 原纤维和矿物质一起工作以抵抗裂,改善骨.
科学领域:
- 生物材料科学 生物材料科学
- 材料机械学 材料机械学
- 骨生物学 骨生物学
背景情况:
- 骨的机械性能取决于其由矿物质和原组成的复合结构.
- 矿物质和原纤维状形态在骨折中的特定作用尚未完全理解.
研究的目的:
- 为了研究矿物质和矿物化原纤维素 (MCF) 形态如何影响层骨骨折行为.
- 在矿物-矿物和矿物-MCF接口上建模损伤机制.
主要方法:
- 开发了一个基于损坏的代表性体积元素 (RVE) 模型.
- 包含一个相场损伤模型来模拟裂的启动和传播.
- 模拟了各种矿物形态和MCF配置.
主要成果:
- 与颗粒状矿物质相比,血小板形矿物质的机械性能优于颗粒状矿物质,因为它们的比例更高.
- 矿化原纤维 (MCFs) 在轴承负载下有效消散能量并抑制裂传播.
- 额外纤维的矿物质也通过阻碍裂的生长,促进了硬化.
结论:
- 矿物质和MCF成分都在叶片骨的硬化机制中发挥着关键作用.
- 矿物质和MCF的联合作用显著抑制了在亚组织层面的裂传播.
- 这些发现为骨的微观结构与属性关系以及骨折行为提供了新的见解.
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