Buckling of thermalized elastic sheets

Buckling of thermalized elastic sheets
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热化弹性片材的屈曲

DOI:
10.1016/j.jmps.2021.104296
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发表时间:
2021
影响因子:
5.3
通讯作者:
Košmrlj, Andrej
Košmrlj, Andrej
中科院分区:
工程技术2区
文献类型:
--
作者:
Morshedifard, Ali;Ruiz-García, Miguel;Abdolhosseini Qomi, Mohammad Javad;Košmrlj, Andrej

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结构和设备小型化的稳步发展已经达到了热波动相关的规模,因此了解这种波动如何影响其机械稳定性是很重要的。在这里,我们研究的热化方片的屈曲下,无论是压缩或剪切。我们表明,热波动增加临界屈曲载荷相比,经典的欧拉屈曲载荷由于增强的尺度相关的弯曲刚度的片材是远远大于一个特征的热长度尺度。所得结果具有普遍性,适用于各种微观薄板。这些结果是特别相关的原子薄的二维材料,其中热波动可以显着增加临界屈曲载荷,因为在室温下的热长度尺度是纳米的顺序。
Steady progress in the miniaturization of structures and devices has reached a scale where thermal fluctuations become relevant and it is thus important to understand how such fluctuations affect their mechanical stability. Here, we investigate the buckling of thermalized square sheets under either compression or shear. We demonstrate that thermal fluctuations increase the critical buckling load compared to the classical Euler buckling load due to the enhanced scale-dependent bending rigidity for sheets that are much larger than a characteristic thermal length scale. The presented results are universal and apply to a wide range of microscopic sheets. These results are especially relevant for atomically thin 2D materials, where thermal fluctuations can significantly increase the critical buckling load because the thermal length scale is on the order of nanometers at room temperature.
DOI: 10.1016/j.jmps.2011.09.003
发表时间: 2011-02
影响因子: 5.3
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