Browsing by Author "Eldeeb, Moaz"
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- ItemTensile behavior of staple fiber yarns, part IV: experimental verification of predicted stress–strain curves(2017-01-04) Zubair, Muhammad; Neckář, Bohuslav; Eldeeb, Moaz; Baig, Gulzar A.In this paper, specific stress–strain curves were predicted for viscose, cotton, and polyester yarns spun by ring and rotor technologies. The average fiber-specific stress–strain curves were used to predict yarn-specific stress–strain curves. The predicted yarn-specific stress–strain curves captured the experimental yarn-specific stress–strain curves well both in shape and position for the three studied yarn types. However, higher prediction error was observed relatively in polyester yarns due to more slippage of fibers in these yarns. All rotor yarns exhibited higher difference between experimental and predicted results which might be the result of the nature of the twist in rotor yarn. © 2016 The Textile Institute
- ItemTensile behavior of staple fiber yarns part III: comparison of mathematical models(2017-01-04) Zubair, Muhammad; Eldeeb, Moaz; Neckář, BohuslavDespite the development of artificial neural network and computer simulation models that predict yarn tensile properties, the mathematical model is still very important being the base for all models. In this research, three mathematical models have been applied for evaluation of coefficient of fiber strength utilization in staple spun yarns before break at same value of yarn strains. The experiments were conducted on cotton, viscose and polyester fibers, and yarns. The results indicated that our model exhibited least prediction error followed by Pan’s and Frydrych’s models for cotton and viscose but for polyester, Pan’s model produced least error followed by Frydrych’s model and our model. The superiority of our model might be resulted from the introduction of the phenomena of fiber directional distribution in the staple spun yarns. © 2016 The Textile Institute