Harnessing energy landscape exploration to control the buckling of cylindrical shells
Harnessing energy landscape exploration to control the buckling of cylindrical shells
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DOI：
10.1038/s42005-019-0251-4
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发表时间：
2019-10
影响因子：
5.5
通讯作者：
Jack R. Panter;Junbo Chen;Teng Zhang;H. Kusumaatmaja
中科院分区：
文献类型：
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作者：
Jack R. Panter;Junbo Chen;Teng Zhang;H. Kusumaatmaja
即使对于相对简单的薄壳形态，许多不同的屈曲配置也可以同时保持稳定。在实践中观察到的状态对环境扰动和壳体缺陷高度敏感。因此，屈曲后响应的复杂性和不可预测性对利用屈曲转变的新兴技术提出了巨大的挑战。在这里，我们展示了如何通过对稳定状态及其之间的过渡机制的全面调查来探索屈曲景观，我们在圆柱壳上进行了演示。这是通过将简单且通用的三角晶格模型与高效的高维自由能最小化和转移路径查找算法相结合来实现的。然后，我们介绍景观偏置的方法，以展示如何利用景观来控制屈曲后响应，并开发抵抗横向扰动的结构。这些方法现在为研究一系列弹性壳上的复杂屈曲现象提供了潜力。
Even for relatively simple thin shell morphologies, many different buckled configurations can be stable simultaneously. Which state is observed in practice is highly sensitive to both environmental perturbations and shell imperfections. The complexity and unpredictability of postbuckling responses has therefore raised great challenges to emerging technologies exploiting buckling transitions. Here we show how the buckling landscapes can be explored through a comprehensive survey of the stable states and the transition mechanisms between them, which we demonstrate for cylindrical shells. This is achieved by combining a simple and versatile triangulated lattice model with efficient high-dimensional free-energy minimisation and transition path finding algorithms. We then introduce the method of landscape biasing to show how the landscapes can be exploited to exert control over the postbuckling response, and develop structures which are resistant to lateral perturbations. These methods now offer the potential for studying complex buckling phenomena on a range of elastic shells.