Affiliation:
1. Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, Champaign, IL 61801
Abstract
Abstract
Soft materials, such as rubber and gels, exhibit rate-dependent response where the stiffness, strength, and fracture patterns depend largely on loading rates. Thus, accurate modeling of the mechanical behavior requires accounting for different sources of rate dependence such as the intrinsic viscoelastic behavior of the polymer chains and the dynamic bond breakage and formation mechanism. In this chapter, we extend the QC approach presented in Ghareeb and Elbanna (2020, An Adaptive Quasi-Continuum Approach for Modeling Fracture in Networked Materials: Application to Modeling of Polymer Networks, J. Mech. Phys. Solids, 137, p. 103819) to include rate-dependent behavior of polymer networks. We propose a homogenization rule for the viscous forces in the polymer chains and update the adaptive mesh refinement algorithm to account for dynamic bond breakage. Then, we use nonlinear finite element framework with predictor–corrector scheme to solve for the nodal displacements and velocities. We demonstrate the accuracy of the method by verifying it against fully discrete simulations for different examples of network structures and loading conditions. We further use the method to investigate the effects of the loading rates on the fracture characteristics of networks with different rate-dependent parameters. Finally, We discuss the implications of the extended method for multiscale analysis of fracture in rate-dependent polymer networks.
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics
Reference46 articles.
1. Fracture and Adhesion of Soft Materials: A Review;Creton;Rep. Prog. Phys.,2016
2. Topology Effects in Model Polymer Networks;Everaers;AIP. Conf. Proc.,2009
3. Mechanical Response of Two-Dimensional Polymer Networks: Role of Topology, Rate Dependence, and Damage Accumulation;Kothari;ASME J. Appl. Mech.,2018
4. A New Constitutive Relation for Rubber;Gent;Rubber. Chem. Technol.,1996
5. Large Elastic Deformations of Isotropic Materials. IV. Further Developments of the General Theory;Rivlin;Phil. Trans. R. Soc. A: Math., Phys. Eng. Sci.,1948
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