Das Moumita, MacKintosh F C, Levine Alex J
Department of Chemistry, University of California, Los Angeles, California 90095, USA.
Phys Rev Lett. 2007 Jul 20;99(3):038101. doi: 10.1103/PhysRevLett.99.038101. Epub 2007 Jul 18.
We develop an effective medium approach to the mechanics of disordered, semiflexible polymer networks and study the response of such networks to uniform and nonuniform strain. We identify distinct elastic regimes in which the contributions of either filament bending or stretching to the macroscopic modulus vanish. We also show that our effective medium theory predicts a crossover between affine and nonaffine strain, consistent with both prior numerical studies and scaling theory.
我们针对无序半柔性聚合物网络的力学特性开发了一种有效介质方法，并研究了此类网络对均匀和非均匀应变的响应。我们确定了不同的弹性区域，其中细丝弯曲或拉伸对宏观模量的贡献消失。我们还表明，我们的有效介质理论预测了仿射应变和非仿射应变之间的转变，这与先前的数值研究和标度理论一致。
