Experiments on Probing the Configuration Space of Post-Buckled Panels
Experiments on Probing the Configuration Space of Post-Buckled Panels
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DOI：
10.1115/1.4048197
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发表时间：
2020-12
期刊：
影响因子：
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通讯作者：
David A. Ehrhardt;L. Virgin;S. Spottswood
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文献类型：
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作者：
David A. Ehrhardt;L. Virgin;S. Spottswood
本文描述了一项主要的实验研究，其中非线性结构部件（细长的机械屈曲面板）受到探测。也就是说，当面板上的特定位置受到（可变）位移约束并以相应的探针力为特征时，探索平衡构型。该探针力（在本研究中位于矩形面板的中心）使用称重传感器测量，并使用数字图像相关（DIC）测量由面板占据的最终形状。虽然探针仅应用于单个位置，但这种安排提供了关于变化的平衡景观的大量信息，包括揭示使用大扰动和相关滞后现象共存的平衡构型。此外，监测探测力，特别是当它降至零时，为“自由”平衡提供了一个窗口，否则将是不稳定和不可观察的。最后，研究表明，探测的平衡配置提供了“景观”，其中任何动态诱导的轨迹演变，包括快照-通过振荡。
This paper describes a primarily experimental study in which a nonlinear structural component (a slender, mechanically buckled panel) is subject to probing. That is, equilibrium configurations are explored when a specific location on the panel is subject to the application of a (variable) displacement constraint and characterized by a corresponding probe force. This probe force (in this study located at the center of the rectangular panels) is measured using a load cell and the resulting shape(s), taken up by the panel, measured using digital image correlation (DIC). Although the probe is only applied at a single location, this arrangement supplies considerable information about the changing equilibrium landscape including revealing co-existing equilibrium configurations using large perturbations and associated hysteresis phenomena. In addition, monitoring the probing force, and specifically when it drops to zero, provides a window into “free” equilibria that would otherwise be unstable and unobservable. Finally, it is shown that the probed equilibrium configurations provide the “landscape” within which any dynamically induced trajectories evolve including snap-through oscillations.