标题： 通过微振动增强粘附力：建模与实验 显示英文标题

标题： Enhancement of adhesion strength through microvibrations: modeling and experiments

摘要： 高频微米振动已被证明对软界面的粘附性能有显著影响，然而理论预测与实验结果之间的详细比较仍然缺失。 在这里，考虑了一个刚性球形压头悬挂在柔软弹簧上，从具有粘附性的粘弹性振动基底上卸载的问题。 实验测试是通过将硼硅玻璃透镜从被高频微米振动激发的柔软PDMS基底上卸载来完成的。 我们表明，一旦振动开始，接触面积就会突然增加，在卸载过程中则大致遵循JKR经典模型，但粘附能显著增加。 我们发现，剥离力随着振动幅度的增加而增加，直到某个饱和水平，该水平似乎与频率有关。 在短程粘附假设下，推导出一个集总机械模型，该模型从独立表征速率依赖的界面粘附出发，定性和定量地预测了实验结果，而无需任何可调参数。 显示英文摘要

摘要： High-frequency micrometrical vibrations have been shown to greatly influence the adhesive performance of soft interfaces, however a detailed comparison between theoretical predictions and experimental results is still missing. Here, the problem of a rigid spherical indenter, hung on a soft spring, that is unloaded from an adhesive viscoelastic vibrating substrate is considered. The experimental tests were performed by unloading a borosilicate glass lens from a soft PDMS substrate excited by high-frequency micrometrical vibrations. We show that as soon as the vibration starts, the contact area increases abruptly and during unloading it decreases following approximately the JKR classical model, but with a much increased work of adhesion. We find that the pull-off force increases with respect to the amplitude of vibration up to a certain saturation level, which appeared to be frequency dependent. Under the hypothesis of short range adhesion, a lumped mechanical model was derived, which, starting from an independent characterization of the rate-dependent interfacial adhesion, predicted qualitatively and quantitatively the experimental results, without the need of any adjustable parameters.