Modeling Adhesive Hysteresis

When an elastomer approaches or retracts from adhesive indenter, the elastomer’s surface can suddenly become unstable and reshape itself quasi-discontinuously, e.g., when small-scale asperities jump into snap out of contact. Such dynamics lead to a hysteresis between approach retraction. In this study, we quantify numerically analytically ensuing unavoidable energy loss for rigid indenters with flat, Hertzian randomly rough profiles. The range adhesion turns be central, in particular during rarely modeled For example, negligible traction on but quite noticeable nominal plane contacts hinges use short-range adhesion. Central attention is paid design cohesive-zone models efficient simulation dynamical processes. Our study includes Griffith’s type analysis lost fracture regeneration flat interface. It reveals that leading-order corrections are due finite-range scale at best, third root linear mesh size, while errors pull-off force disappear linearly.