Effects of Two Scaling Exponents on Swelling-Induced Softening of Elastomers under Equibiaxial and Planar Extensions
Effects of Two Scaling Exponents on Swelling-Induced Softening of Elastomers under Equibiaxial and Planar Extensions
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DOI：
10.4028/www.scientific.net/kem.725.427
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发表时间：
2016-12
期刊：
影响因子：
--
通讯作者：
D. Okumura;M. Mizutani
中科院分区：
文献类型：
--
作者：
D. Okumura;M. Mizutani
研究了两个标度指数对膨胀弹性体在等轴拉伸和平面拉伸下的力学性能的影响。引入了两个标度指数来扩展Flory-Rehner自由能函数，并在前人研究的基础上进行了调整。结果表明，与单轴拉伸相比，等轴拉伸更容易发生膨胀引起的应变软化。横向上的附加拉应力使其能够在相对较差的溶剂中发生，并加速了起始点。平面拉伸表现出更复杂的响应，因为约束方向上的应力随两个标度指数和Flory-Huggins相互作用参数的组合而发生显著变化。
We study the effects of two scaling exponents on the mechanical properties of swollen elastomers under equibiaxial and planar extensions. Two scaling exponents are introduced to extend the Flory-Rehner free energy function, and are adjusted based on the previous study. Results show that swelling-induced strain softening is apt to occur under equibiaxial extension compared to uniaxial extension. The additional tensile stress in a lateral direction enables it to occur in relatively poor solvents, and accelerates the onset point. Planar extension shows more complicated responses because the stress in the constrained direction changes dramatically depending on the combination of two scaling exponents and the Flory-Huggins interaction parameter.