Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5021648 | Composites Part B: Engineering | 2017 | 25 Pages |
Abstract
A new class of polymers characterized by dynamic cross-links is analyzed from a mechanical point of view. A thermodynamically consistent model is developed within the Lagrangian framework for polymers that can rearrange their internal cross-links. Such a class of polymers has the capability to reset their internal microstructure and the microscopic remodeling mechanism leads to a behavior similar to that of an elastic fluid. These materials can potentially be used in several fields, such as in biomechanics, smart materials, morphing materials to cite e few. However, a comprehensive understanding is necessary before we can predict their behavior and perform material design for advanced technologies. The proposed formulation -following a statistical approach adapted from classical rubber elasticity- is based on the evolution of the molecular chains' end-to-end distance distribution function. This distribution is allowed here to evolve with time, starting from an initial stress-free state and depending on the deformation history and the cross-link attachment/detachment kinetics. Some simple examples are finally presented and discussed to illustrate the capability and generality of the developed approach.
Related Topics
Physical Sciences and Engineering
Engineering
Engineering (General)
Authors
Roberto Brighenti, Franck J. Vernerey,