弹性圆盘在圆形支撑环上的压痕
Indentation of an elastic disk on a circular supporting ring
AI总结：
本文通过实验与理论研究圆形环支撑弹性圆盘的压痕行为，揭示压缩应力通过遍布屈曲或局部d-锥两种途径释放，并给出压痕阈值与纵横比的关系。
摘要：
受压缩应力作用的薄弹性二维系统可能通过产生面外起伏来释放部分拉伸能。我们通过实验和理论研究了由圆形环支撑的弹性圆盘的压痕，并表明压缩应力通过两种不同途径释放：要么形成遍布整个系统的屈曲，要么形成变形集中于系统局部区域的d-锥。我们表征了褶皱或d-锥存在的压痕阈值随纵横比的变化关系。
英文摘要：
Thin elastic two-dimensionnal systems under compressive stresses may relieve part of their stretching energy by developing out of plane undulations. We investigate experimentally and theoretically the indentation of an elastic disk supported by a circular ring and show that compressive stresses are relieved via two different routes : either developing \textit{buckles} which are spread over the system or developing a \textit{d-cone} where deformation is concentrated in a subregion of the system. We characterize the indentation threshold for wrinkles or d-cone existence as a function of aspect ratio.
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