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Modeling the Fibrillation of Kevlar® KM2 Single Fibers Subjected to Transverse Compression
Jeffrey M. Staniszewski,Subramani Sockalingam,Travis A. Bogetti,John W. Gillespie Jr 한국섬유공학회 2018 Fibers and polymers Vol.19 No.7
In this work, fibrillation is introduced as an energy absorbing mechanism in the modeling of Kevlar® KM2 single fibers subjected to quasi-static transverse compression. Fibrillation is simulated using a finite element model of the fiber cross-section containing discrete fibrils connected by interfibrillar cohesive zones. Model predictions of nominal stress-strain response for an assumed bilinear cohesive traction-separation interfibrillar behavior are compared to experimental data. Analysis shows that modeling of the microstructural fibril network, represented by a distribution of strong cohesive interactions, is necessary to capture the experimental response. The model provides valuable insight into the unique deformation mechanisms governing fiber fibrillation under transverse compression.