Effects of two scaling exponents on biaxial deformation and mass transport of swollen elastomers
Effects of two scaling exponents on biaxial deformation and mass transport of swollen elastomers
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DOI：
10.1016/j.ijmecsci.2017.08.042
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发表时间：
2017-08
影响因子：
7.3
通讯作者：
D. Okumura;M. Mizutani;Hiro Tanaka;M. Uchida
中科院分区：
文献类型：
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作者：
D. Okumura;M. Mizutani;Hiro Tanaka;M. Uchida
在这项研究中，我们研究了两个比例指数对膨胀弹性体的双轴变形和质量传递的影响。 Flory–Rehner 模型的扩展版本中包含两个缩放指数（Okumura 等人，J. Mech. Phys. Solids，2016）；使用两个缩放指数来调整膨胀对膨胀弹性体的杨氏模量和渗透压的影响，从而能够预测单轴拉伸载荷下膨胀引起的应变软化。研究发现，当在应力控制下施加双轴拉伸载荷时，应变软化随着双轴应力比的增加而加速，而在应变控制下，响应变得更加复杂，这可以通过考虑平衡自由膨胀时的泊松比可以根据两个比例指数取负值来解释。此外，通过分析刚性基底上约束的凝胶层的溶胀动力学，讨论了两个比例指数对质量传递的影响。
In this study, we investigate the effects of two scaling exponents on the biaxial deformation and mass transport of swollen elastomers. Two scaling exponents are included in an extended version of the Flory–Rehner model (Okumura et al., J. Mech. Phys. Solids, 2016); two scaling exponents are used to adjust the swelling effects on the Young's modulus and osmotic pressure of swollen elastomers, resulting in the ability to predict swelling-induced strain softening under uniaxial tensile loading. It is found that when biaxial tensile loading is given under stress control, strain softening is accelerated by increasing the biaxial stress ratio, while under strain control, the responses become more complicated, which can be interpreted by considering that Poisson's ratio at equilibrium free swelling can take negative values depending on the two scaling exponents. Further, the effect of the two scaling exponents on mass transport is discussed by analyzing the swelling kinetics of a gel layer constrained on a rigid substrate.