A two-scale strategy for the modeling of hook and loop fasteners. (November 2021)

• Record Type: Journal Article
• Authors: Restrepo, Vanessa; Hosseini, Maryam S.; Gallant, Chris; Weymouth, Bradley; Zavattieri, Pablo
• Is Part Of: Journal of the mechanics and physics of solids. Volume 156(2021)
• Publication Date: 2021-11
• Subjects: Hook-and-loop fasteners -- Two-scale modeling -- Detachment process zone (DPZ) -- Cohesive zone model (CZM) -- Fracture; Mechanics, Applied -- Periodicals; Solids -- Periodicals; Mechanics -- Periodicals; Mécanique appliquée -- Périodiques; Solides -- Périodiques; Mechanics, Applied; Solids; Periodicals; 531.05
• DOI: 10.1016/j.jmps.2021.104600
• Languages: English
• ISSNs: 0022-5096

Abstract

Abstract: Hook-and-loop-like joints have been widely used in many engineering applications and even observed in nature. The demand for computational models to predict the behavior of fasteners is increasing as they will be key for reducing design process time and manufacturing costs. Here, we develop a bottom-up two-scale modeling strategy, which enables us to capture the mechanical performance of a hook-and-loop fastener at both micro- and macroscales. In particular, we employ a two-scale homogenization approach capable of predicting the mechanical behavior of the hook-and-loop fastener. The model starts with a micromechanical model of a hook-and-loop fastener which considers the detailed geometry of the individual building blocks of the hook-and-loop fastener and their statistical geometrical variability through a so-called Representative Hook and Loop Element (RHLE) computational domain. The second scale considers the homogenization of the micromechanical model into a Detachment Process Zone (DPZ) which reveals an emerging length scale. The resulting effective traction-separation law concept is then employed at the macroscale with a Double Cantilever Beam (DCB) test using a macroscale model, which is then validated with experiments. The results suggest that the two-scale model strategy is able to predict the mechanical behavior of hook-and-loop fastener and to capture the main deformation and dissipative mechanisms at the relevant length scales. Graphical abstract: Image, graphical abstract