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基于ASTM F171717的脊柱结构测试的模拟和验证

Byeong Cheol Jeong¹, On Sim¹, Chiseung Lee^2,3

¹Department of Biomedical Engineering, Graduate School, Pusan National University, Busan, Republic of Korea.

Frontiers in bioengineering and biotechnology

|December 12, 2025

概括

经过验证的有限元分析 (FEA) 准确地预测了脊柱结构机制,证实了螺丝直径是性能的关键. 这支持FEA作为早期脊柱植入物设计的可靠工具,增强结构耐用性和外科安全性.

科学领域:

生物医学工程生物医学工程
整形外科手术整形外科手术
材料科学材料科学材料科学

背景情况:

脊柱固定结构在临床应用之前需要严格的机械评估.
ASTM F1717提供了一个标准化的脊椎切除模型用于静态机械测试.
有限元分析 (FEA) 越来越多地用于模拟和预测机械行为.

研究的目的:

用ASTM F1717.1来评估脊柱固定结构的机械性能.
为了验证FEA在模拟设计决策的结构力学中的使用.
确定影响构造机械响应的关键几何因素.

主要方法:

使用Ti-6Al-4V ELI脚螺丝和UHMWPE块的结构根据ASTM F1717进行了测试.
在静态压缩和张力下,评估了四种不同直径和长度的螺丝配置.
与实验数据进行了FEA模型 (包括和不包括jig) 的比较.

主要成果:

FEA对实验结果表现出强烈的认同 (误差通常为<5%).
与螺丝长相比,增加螺丝直径显著增加了反应力.
吉格排除模型将计算时间减少了20-32%,对准确度的影响最小.

结论:

验证的FEA准确地复制了ASTM F1717的构造行为,作为早期设计选的有价值工具.
螺丝直径是影响构造力学的主导几何因素,而长度的影响较小.
在脊柱植入物设计中,FEA可以可靠地补充体检,潜在地提高结构耐用性和外科安全性.

关键词:

这是ASTM F1717的标准.计算建模计算建模有限元分析是有限元分析.模拟模拟是指一个模拟模拟器.脊柱植入物是一种植入物.静态压缩和张力的静态压缩和张力.

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