Direct simulations of fiber network deformation and failure
2012 (English)In: Mechanics of materials (Print), ISSN 0167-6636, Vol. 51, 1-14 p.Article in journal (Refereed) Published
A finite element model for 3D random fiber networks was constructed to simulate deformation and failure behavior of networks with dynamic bonding/debonding properties. Such fiber networks are ubiquitous among many living systems, soft matters, bio-materials, and engineering materials (papers and non-woven). A key feature of this new network model is the fiber–fiber interaction model that is based on AFM measurements from our earlier study. A series of simulations have been performed to investigate strain localization behavior, strength statistics, in particular, the variations of strength, strain-to-failure and elastic modulus, and their size dependence. Other variables investigated are fiber geometries. The result showed that, in spite of its disordered structure, strength and elastic modulus of a fiber network varied very little statistically, as long as the average number of fibers in the simulated specimen and the degree of fiber orientation are kept constant. However, strain-to-failure showed very significant statistical variations, and thus more sensitivity to the disordered structures.
Place, publisher, year, edition, pages
2012. Vol. 51, 1-14 p.
Ductile failure, Fiber network, Disordered materials, Particle-level simulations
IdentifiersURN: urn:nbn:se:kth:diva-93965DOI: 10.1016/j.mechmat.2012.03.010ISI: 000306033000001OAI: oai:DiVA.org:kth-93965DiVA: diva2:524668
QC 201206192012-05-032012-05-032012-07-31Bibliographically approved