ABSTRACT

Pressure can sometimes be utilized to increase or decrease the strength of adhesion. This phenomenon is analyzed for pull-off of a flat, circular cylindrical punch from a circular membrane. The pressure is applied, and then the punch is pulled upward. Both force control and displacement control are considered, and the pressure may be positive (acting upward) or negative (acting downward) on the membrane. The membrane is assumed to be linearly elastic, and Föppl-von Kármán theory is used to allow moderate displacements. The JKR theory of adhesion is adopted. A transversality (debonding) condition is derived, and then the effects of the work of adhesion, Poisson’s ratio, residual stress, and the relative radius of the punch to that of the membrane are investigated. With an increase in pressure, the pull-off force decreases, the pull-off deflection of the punch relative to the initial flat membrane level increases, and the total pull-off punch deflection from the pressurized membrane may increase or decrease.

摘要

有时可以利用压力来增加或降低粘合强度。分析这种现象以从圆形膜上拉下扁平的圆柱形冲头。施加压力，然后将冲头向上拉。同时考虑力控制和位移控制，膜上的压力可以是正的（向上作用）或负的（向下作用）。假定膜是线弹性的，并且 Föppl-von Kármán 理论用于允许适度的位移。采用 JKR 粘附理论。导出了横向（脱粘）条件，然后研究了粘附功、泊松比、残余应力以及冲头与膜的相对半径的影响。随着压力的增加，拉脱力减小，