Experimental investigation and modeling of the behavior of commingled yarns
Résumé
Stress-strain tensile behavior of commingled glass-fiber/polypropylene yarns is experimentally investigated. Values of Young modulus, breaking stress and breaking strain of yarns and their dependence to strain rate and gauge length are evaluated. A comparison of tensile behavior of yarns before and after weaving of a 3D-fabric is performed in order to estimate the influence of weaving damage. Taking into account the particular commingled yarn structure, a model is proposed to describe accurately their full stress-strain tensile behavior. Parameters of the model are identified in the light of experimental results.
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