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首页> 外文期刊>Journal of Applied Polymer Science >Measurement of the Nonlinear Mechanical Properties of a Poly(vinyl alcohol) Sponge Under Longitudinal and Circumferential Loading
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Measurement of the Nonlinear Mechanical Properties of a Poly(vinyl alcohol) Sponge Under Longitudinal and Circumferential Loading

机译：纵向和周向载荷作用下聚乙烯醇海绵非线性力学性能的测量

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摘要

Poly(vinyl alcohol) sponges (P-sponges) have been used as a potential implant material for the replacement and repair of soft tissues, including cartilage, liver, and kidney. However, the application of P-sponges as tissue replacement materials is almost entirely bounded because of a lack of sufficient mechanical properties. In this study, we characterized the mechanical properties of a fabricated poly(vinyl alcohol) sponge (P-sponge) under a series of longitudinal and circumferential uniaxial loadings. The nonlinear mechanical behavior of the P-sponge was also computationally investigated with hyperelastic strain energy density functions, that is, the Ogden, Yeoh, Mooney-Rivlin, and Neo-Hookean models. A hyperelastic constitutive model was selected to best fit the axial behavior of the sponge. The results reveal that the Young's modulus and maximum stress of the P-sponge in the longitudinal direction were 16 and 17% greater than that in the circumferential direction, respectively. The Yeoh model, in addition, was selected to represent the nonlinear behavior of the poly(vinyl alcohol) material and could be used in future biomechanical simulations of the soft tissues. These results can be used to understand the mechanical properties of spongy materials in different loading directions. In addition, they have implications for ophthalmic and plastic surgeries and wound healing and tissue engineering purposes.
机译：聚乙烯海绵（P海绵）已被用作潜在的植入材料，用于替换和修复包括软骨，肝脏和肾脏在内的软组织。然而，由于缺乏足够的机械性能，P-海绵作为组织替代材料的应用几乎完全受限。在这项研究中，我们表征了制造的聚乙烯醇海绵（P海绵）在一系列纵向和圆周单轴载荷下的力学性能。还使用超弹性应变能密度函数（即Ogden，Yeoh，Mooney-Rivlin和Neo-Hookean模型）对P海绵的非线性力学行为进行了计算研究。选择了超弹性本构模型以最适合海绵的轴向行为。结果表明，P型海绵的纵向杨氏模量和最大应力分别比周向大16％和17％。此外，还选择了Yeoh模型来表示聚乙烯醇材料的非线性行为，并将其用于未来软组织的生物力学模拟。这些结果可用于了解海绵材料在不同加载方向上的机械性能。另外，它们对于眼科和整形外科以及伤口愈合和组织工程目的有影响。

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