2019/07/30 by Maximilian J. Grill, Christoph Meier, Grill, Maximilian J. +3 · 1 citation
Engineering · #Adhesion, Friction, and Surface Interactions #Advanced Materials and Mechanics #Advanced Sensor and Energy Harvesting Materials #Biological Physics (physics.bio-ph) #Computational Engineering #FOS: Computer and information sciences #FOS: Physical sciences #Finance #and Science (cs.CE)
paper · pdf · doi:10.48550/arxiv.1907.13021
openalex publication_date 2019/07/30 · openalex created_date 2022/07/28 · openalex updated_date 2026/07/28
This article studies the fundamental problem of separating two adhesive\nelastic fibers based on numerical simulation employing a recently developed\nfinite element model for molecular interactions between curved slender fibers.\nSpecifically, it covers the two-sided peeling and pull-off process starting\nfrom fibers contacting along its entire length to fully separated fibers\nincluding all intermediate configurations and the well-known physical\ninstability of snapping into contact and snapping free. We analyze the\nresulting force-displacement curve showing a rich and highly nonlinear system\nbehavior arising from the interplay of adhesion, mechanical contact interaction\nand structural resistance against (axial, shear and bending) deformation. While\nsimilar to one-sided peeling studies from the literature, a distinct initiation\nand peeling phase can be observed, the two-sided peeling setup considered in\nthe present work reveals the extended final pull-off stage as third\ncharacteristic phase. Moreover, the influence of different material and\ninteraction parameters such as Young's modulus as well as type (electrostatic\nor van der Waals) and strength of adhesion is critically studied. Most\nimportantly, it is found that the maximum force occurs in the pull-off phase\nfor electrostatic attraction, but in the initiation phase for van der Waals\nadhesion. In addition to the physical system behavior, the most important\nnumerical aspects required to simulate this challenging computational problem\nin a robust and accurate manner are discussed. Thus, besides the insights\ngained into the considered two-fiber system, this study provides a proof of\nconcept facilitating the application of the employed model to larger and\nincreasingly complex systems of slender fibers.\n