This study of energy loss due to friction in dynamic loading conditions provides a new approach to characterizing fiber-on-fiber friction. Based on the theory of dynamic me chanical behavior of polymeric materials, the systematic experimental study uses cotton and polyester rovings to examine the effect of twist level, cyclic loading magnitude and frequencies, and gauge length on frictional energy loss. The test results are analyzed in comparison with Murayama's dynamic mechanical model. The model does not fit the experimental data, and a modification is proposed for characterizing the frictional energy loss of twisted staple fiber structures.
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