联合无约束和约束压缩法测定牛半月板的泊松比。
Poisson's ratio of bovine meniscus determined combining unconfined and confined compression.
机构信息
Department of Mechanical Engineering, Colorado State University, Fort Collins, CO, USA; Department of Applied Physics, University of Eastern Finland, POB 1627, FI-70211 Kuopio, Finland.
Department of Applied Physics, University of Eastern Finland, POB 1627, FI-70211 Kuopio, Finland; Department of Clinical Neurophysiology, Kuopio University Hospital, POB 100, FI-70029, KYS, Kuopio, Finland.
出版信息
J Biomech. 2018 Aug 22;77:233-237. doi: 10.1016/j.jbiomech.2018.07.001. Epub 2018 Jul 25.
Poisson's ratio has not been experimentally measured earlier for meniscus in compression. It is however an important intrinsic material property needed in biomechanical analysis and computational models. In this study, equilibrium Poisson's ratio of bovine meniscus (n = 6) was determined experimentally by combining stress-relaxation measurements in unconfined and confined compression geometries. The average Young's modulus, aggregate modulus and Poisson's ratio were 0.182 ± 0.086 MPa, 0.252 ± 0.089 MPa and 0.316 ± 0.040, respectively. These moduli are consistent with previously determined values, but the Poisson's ratio is higher than determined earlier for meniscus in compression through biomechanical modelling analysis. This new experimentally determined Poisson's ratio value could be used in the analysis of biomechanical data as well as in computational finite element analysis when the Poisson's ratio is needed as an input for the analysis.
先前尚未对半月板在受压时的泊松比进行过实验测量。然而，它是生物力学分析和计算模型中所需的重要固有材料特性。在这项研究中，通过结合无约束和约束压缩几何形状下的应力松弛测量，实验确定了牛半月板的平衡泊松比（n=6）。平均杨氏模量、聚合模量和泊松比分别为 0.182±0.086 MPa、0.252±0.089 MPa 和 0.316±0.040。这些模量与先前确定的值一致，但泊松比高于先前通过生物力学建模分析确定的半月板在压缩时的泊松比。当泊松比作为分析的输入需要时，这个新的通过实验确定的泊松比值可以用于生物力学数据的分析以及计算有限元分析。
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