In this paper, the Von Mises stresses and stiffnesses measured by experiments on a human cadaveric tibia and composite ones compared to those predicted by a FE model based on the same bone. Modeling of exact geometric...In this paper, the Von Mises stresses and stiffnesses measured by experiments on a human cadaveric tibia and composite ones compared to those predicted by a FE model based on the same bone. Modeling of exact geometrical tibia including cortical and spongy bone using human bone CT scan images and mechanical validating of obtained model, is the aim of this study .The model produced by the current study supplies a tool for simulating mechanical test conditions on human tibia.展开更多
下肢长骨骨折损伤在汽车碰撞事故中常见,使用人体有限元模型可以有效开展损伤风险和机理的研究。个体特征(如性别、年龄、身高、体重等)对下肢长骨的几何形状和密质骨厚度具有显著影响。该文以男性中等尺寸有限元模型为基准模型,基于95...下肢长骨骨折损伤在汽车碰撞事故中常见,使用人体有限元模型可以有效开展损伤风险和机理的研究。个体特征(如性别、年龄、身高、体重等)对下肢长骨的几何形状和密质骨厚度具有显著影响。该文以男性中等尺寸有限元模型为基准模型,基于95例国内临床计算机断层扫描(computed tomography,CT)数据,通过网格投影变换和统计学分析建立了能够反映个体特征差异的股骨和胫骨的参数化模型。结果表明:外表面几何模型的平均绝对预测误差在3mm以内,密质骨厚度模型的平均绝对预测误差在0.6mm以内。下肢长骨长度对几何模型影响最显著,年龄和身体质量指数(body mass index,BMI)对股骨密质骨厚度具有显著影响,年龄对胫骨密质骨厚度具有显著影响。展开更多
文摘In this paper, the Von Mises stresses and stiffnesses measured by experiments on a human cadaveric tibia and composite ones compared to those predicted by a FE model based on the same bone. Modeling of exact geometrical tibia including cortical and spongy bone using human bone CT scan images and mechanical validating of obtained model, is the aim of this study .The model produced by the current study supplies a tool for simulating mechanical test conditions on human tibia.
文摘下肢长骨骨折损伤在汽车碰撞事故中常见,使用人体有限元模型可以有效开展损伤风险和机理的研究。个体特征(如性别、年龄、身高、体重等)对下肢长骨的几何形状和密质骨厚度具有显著影响。该文以男性中等尺寸有限元模型为基准模型,基于95例国内临床计算机断层扫描(computed tomography,CT)数据,通过网格投影变换和统计学分析建立了能够反映个体特征差异的股骨和胫骨的参数化模型。结果表明:外表面几何模型的平均绝对预测误差在3mm以内,密质骨厚度模型的平均绝对预测误差在0.6mm以内。下肢长骨长度对几何模型影响最显著,年龄和身体质量指数(body mass index,BMI)对股骨密质骨厚度具有显著影响,年龄对胫骨密质骨厚度具有显著影响。
