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The effect of adipose tissue material properties on the lap belt-pelvis interaction: A global sensitivity analysis.
Journal of the Mechanical Behavior of Biomedical Materials ( IF 3.9 ) Pub Date : 2020-03-24 , DOI: 10.1016/j.jmbbm.2020.103739
H Naseri 1 , J Iraeus 1 , H Johansson 1
Affiliation  

The lap belt-pelvis interaction is one of the main factors influencing the risk for abdominal and lower extremity injuries during vehicular crashes. To numerically study the lap belt-pelvis interaction, biofidelic representation of subcutaneous adipose tissue appears essential, especially for obese occupants with a thick layer of adipose tissue. Therefore, in this study, a finite element model is constructed and a newly developed material model for adipose tissue from the previous work is implemented to study the mechanism of lap belt-pelvis interaction and how subcutaneous adipose tissue affects this. Global Sensitivity Analysis (GSA) is used to determine which aspects of the mechanical properties of adipose tissue play a major role in the lap belt-pelvis interaction. It is found that, firstly, the incompressibility condition of adipose tissue is the most influential parameter. Secondly, the nonlinear elastic and viscoelastic properties are influential because of experiencing large deformation. The findings of this study are meaningful for vehicular injury-oriented characterization of adipose tissue as well as improving the biofidelity of finite element human body models for human safety.



中文翻译:

脂肪组织材料特性对腰带-骨盆相互作用的影响:整体敏感性分析。

腰带与骨盆之间的相互作用是影响车祸期间腹部和下肢受伤风险的主要因素之一。为了对腰带-骨盆之间的相互作用进行数值研究,皮下脂肪组织的生物弹性表现似乎必不可少,特别是对于脂肪组织较厚的肥胖者而言。因此,在这项研究中,建立了一个有限元模型,并根据先前的工作采用了新开发的脂肪组织材料模型,以研究腰带-骨盆相互作用的机制以及皮下脂肪组织如何影响这一点。全球敏感性分析(GSA)用于确定脂肪组织机械特性的哪些方面在腰带-骨盆相互作用中起主要作用。发现,首先,脂肪组织的不可压缩条件是影响最大的参数。其次,由于经历大的变形,非线性弹性和粘弹性特性是有影响的。这项研究的发现对于脂肪组织以车辆损伤为导向的表征以及提高有限元人体模型对人类安全的生物保真度具有重要意义。

更新日期:2020-03-24
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