Abstract
In this paper, the theory developed in a previous paper is extended to investigate the movement of picks in the cloth fell after and during beat-up. This is done for a weaving model in which the picks are represented by rigid incompressible cylindrical rods and the warp by incompressible cylindrical filaments of finite flexural rigidity. A friction law of the form F = cWn is assumed to apply for movement of the weft relative lo the warp. It is shown that picks slipping back in the warp after beat-up are responsible for very large increases in beat-up force and also cause discontinuities in the relation between beat-up force and pick-spacing. The effect of varying several weaving parameters is discussed, and numerical results are obtained for a series of hypothetical cases. These show that a high warp tension before beat-up and a low fabric tension during beat-up minimize the increase in beat-up force that is due to pick movement. They also show that a large shed angle at beat-up will reduce the pick movem...
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