Pereira J M, Mansour J M, Davis B R
Department of Mechanical and Aerospace Engineering, Case Western Reserve University, Cleveland, Ohio 44106.
J Biomech Eng. 1991 Feb;113(1):30-5. doi: 10.1115/1.2894082.
The effects of the stratum corneum and dermis on shear wave propagation along the skin surface was investigated using a mathematical model. The skin was modeled as two distinct viscoelastic layers, one representing the stratum corneum and the other representing the dermis. The layers were supported by a semi-infinite visco-elastic half-space representing the subcutaneous fat. Physical and mechanical properties of the materials in the model were determined from the literature and from our own experimental measurements. Although the stratum corneum is very thin (12-15 microns), results showed that it could have a strong effect on the wave propagation due to its high stiffness relative to the dermis. Results of the analysis are discussed with respect to an experimental procedure used to determine age-related changes in mechanical properties of skin.
利用数学模型研究了角质层和真皮对沿皮肤表面剪切波传播的影响。皮肤被建模为两个不同的粘弹性层，一个代表角质层，另一个代表真皮。这些层由代表皮下脂肪的半无限粘弹性半空间支撑。模型中材料的物理和力学性能由文献和我们自己的实验测量确定。尽管角质层非常薄（12 - 15微米），但结果表明，由于其相对于真皮具有较高的刚度，它可能对波传播有强烈影响。针对用于确定皮肤力学性能与年龄相关变化的实验程序，讨论了分析结果。
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