Prescribing patterns in growing tubular soft matter by initial residual stress
Prescribing patterns in growing tubular soft matter by initial residual stress
复制标题
通过初始残余应力规定管状软物质生长的模式
DOI：
10.1039/c9sm01563a
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发表时间：
2019
期刊：
影响因子：
3.4
通讯作者：
Destrade Michel
中科院分区：
文献类型：
--
作者：
Du Yangkun;Lü Chaofeng;Liu Congshan;Han Zilong;Li Jian;Chen Weiqiu;Qu Shaoxing;Destrade Michel
初始残余应力在生物组织和软组织中无处不在，并会显著影响生长诱导模式的选择。在这里，我们通过让软管在有或没有初始残余应力的情况下生长以及通过观察不同的生长模式的演变来实验地证明这一效应。这些实验激励我们对正在生长的双层管状器官在其内表面自发显示弯曲图案时所起作用的机制进行建模。我们证明，不仅不同的生长、几何和弹性，而且初始残余应力分布对这些花样现象有显著的影响。规定初始残余应力分布为实现可生长生物组织或软物质的模式选择提供了一种替代或更有效的方法。研究结果也显示了设计4D仿生打印协议或控制水凝胶致动器的前景。
Initial residual stress is omnipresent in biological tissues and soft matter, and can affect growth-induced pattern selection significantly. Here we demonstrate this effect experimentally by letting soft tubes grow in the presence or absence of initial residual stress and by observing different growth pattern evolutions. These experiments motivate us to model the mechanisms at play when a growing bilayer tubular organ spontaneously displays buckling patterns on its inner surface. We demonstrate that not only differential growth, geometry and elasticity, but also initial residual stress distribution, exert a notable influence on these pattern phenomena. Prescribing an initial residual stress distribution offers an alternative or a more effective way to implement pattern selection for growable bio-tissues or soft matter. The results also show promise for the design of 4D bio-mimic printing protocols or for controlling hydrogel actuators.