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Mechanical behavior characterization of knitted textiles
Thesis   Open access

Mechanical behavior characterization of knitted textiles

Mustafa Oncul
Master of Science (M.S.), Drexel University
Dec 2017
DOI:
https://doi.org/10.17918/D8HH3C
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Abstract

Textile fibers Textile fabrics Mechanical Engineering Mechanics
Knitted textiles are flexible and geometrically hierarchical 3D materials dominated by complex microstructure-property-behavior relations. From the microscale (fiber level) to the macroscale (fabric level) these relations are influenced by a number of factors including material properties, geometry, topological arrangements of yarns, yarn-to-yarn interactions etc. Generally, the experimentation methodologies currently used to characterize the mechanical behavior of knitted textiles are performed to investigate their performance at the global/bulk level. In this context, the research presented in this thesis attempts to provide a multiscale framework suitable for quantitative characterization of the mechanical behavior of this class of materials. To achieve this goal, mechanical testing at two different scales was coupled with full-field deformation mapping. To demonstrate the approach two types of knit architectures were investigated including specimens of single jersey and rib knits. Each of the two knit architectures was tested using specimens having two different sizes. The experimental findings of this research validated previously reported simulation results that predicted anisotropic, nonlinear and multiscale-dependent mechanical behavior of knitted textiles, while they provide a testing framework that can be expanded to other classes of 3D architectured materials.

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