科研之友
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摘要
This paper describes a new energy model of yarn bending. The fibre bending and torsion energy terms are considered. The fibre helices could be naturally curved. Fibre helices in a bent yarn are generated by a rotating vector. The singularity of torsion along a bent fibre helix is discussed. By allowing the rotation speed of the rotating vector to vary exponentially along the fibre path, a more realistic fibre path can be defined and the singular point of torsion can be avoided. Fibres are allowed to self-detwist in order to minimise the total potential energy of the bent yarn. Inter-fibre frictional effects have been neglected. Experimental work on yarn bending has been performed to validate the new model. A good level of agreement has been found between the theory and the experiment.
- 出版日期2006
- 单位香港理工大学
