Singular dynamics in the failure of soft adhesive contacts.

摘要: We characterize the mechanical recovery of compliant silicone gels following adhesive contact failure. establish broad, stable contacts between rigid microspheres and soft gels, then stretch to large deformations by pulling quasi-statically on contact. Eventually, begins fail, ultimately slides a final point bottom sphere. Immediately after detachment, gel recoils quickly with self-similar surface profile that evolves as power law in time, suggesting detachment is singular. The singular dynamics we observe are consistent relaxation process driven stress slowed viscous flow through porous, elastic network gel. Our results emphasize importance accounting for both liquid solid phases understanding their mechanics, especially under extreme deformation.