Kindig Matthew, Li Zuoping, Kent Richard, Subit Damien
a Center for Applied Biomechanics, University of Virginia , Charlottesville , VA , USA.
Comput Methods Biomech Biomed Engin. 2015;18(5):556-70. doi: 10.1080/10255842.2013.820718. Epub 2013 Aug 15.
Current finite element (FE) models of the human thorax are limited by the lack of local-level validation, especially in the ribcage. This study exercised an existing FE ribcage model for a 50th percentile male under quasi-static point loading and dynamic sternal loading. Both force-displacement and kinematic responses of the ribcage were compared against experimental data. The sensitivity of the model response to changes in the material properties of the costovertebral (CV) joints and intercostal muscles was assessed. The simulations found that adjustments to the CV joints tended to change the amount of rib rotation in the sagittal plane, while changes to the elastic modulus and thickness of the intercostal muscles tended to alter both the stiffness and the direction and magnitude of rib motions. This study can lend insight into the role that the material properties of these two thoracic structures play in the dynamics of the ribcage during a frontal loading condition.
当前人体胸部的有限元（FE）模型因缺乏局部层面的验证而受到限制，尤其是在胸腔部分。本研究对一个第50百分位男性的现有有限元胸腔模型进行了准静态点加载和动态胸骨加载测试。将胸腔的力-位移和运动学响应与实验数据进行了比较。评估了模型响应对于肋椎（CV）关节和肋间肌材料属性变化的敏感性。模拟结果发现，对CV关节的调整往往会改变肋骨在矢状面内的旋转量，而肋间肌弹性模量和厚度的变化则往往会改变肋骨运动的刚度以及方向和幅度。本研究能够深入了解这两个胸部结构的材料属性在正面加载条件下对胸腔动态所起的作用。
