论文标题
软复合柱中塌陷的毛细管控制
Capillary control of collapse in soft composite columns
论文作者
论文摘要
Euler屈曲是在其末端受到纵向压缩力的柱的弹性不稳定性。当压缩负荷达到临界值并且无限波动会导致幅度较大的挠度时，屈曲不稳定会发生。自欧拉（Euler）的原始研究以来，该过程已在均质，各向同性，线性弹性固体中进行了广泛的研究。在这里，我们研究了不均匀的软复合材料中屈曲的性质。特别是，我们考虑了一个相对于弹性毛细血管长度的液体夹杂物的软宿主，分别导致均匀复合材料的软化和僵硬。但是，通过施加纳入体积分数的梯度或通过改变包含大小，我们可以故意操纵柱的复合特性的空间结构，从而控制Euler屈曲的性质。
Euler buckling is the elastic instability of a column subjected to longitudinal compression forces at its ends. The buckling instability occurs when the compressing load reaches a critical value and an infinitesimal fluctuation leads to a large amplitude deflection. Since Euler's original study, this process has been extensively studied in homogeneous, isotropic, linear-elastic solids. Here, we examine the nature of the buckling in inhomogeneous soft composite materials. In particular, we consider a soft host with liquid inclusions both large and small relative to the elastocapillarity length, which lead to softening and stiffening of a homogeneous composite respectively. However, by imposing a gradient of the inclusion volume fraction or by varying the inclusion size we can deliberately manipulate the spatial structure of the composite properties of a column and thereby control the nature of Euler buckling.
