Shear deformation of annular shaped woven fabrics

For weaving shaped fabrics,the batch roller on shape weaving frame is of cone frustum,not cylinder,which makes the shear deformation happen when copping,thus forming a shear angle so that the structure of the shaped fabric differs remarkably before and after looming.This paper,aiming at solving the weft shear deformation problem which exists in annular shaped fabric′s weaving,analyzes the structural characteristics of the annular shaped fabric when weaving and winding,establishes a shear deformation model of the annular shaped woven fabric,derives a theoretical shear deformation formula,and calculates the weft-wise shear angle of the fabric.The comparison between the calculated shear angle and the measured one demonstrates that the two are very close.This proves the derived theoretical formula is correct and accords with the actual situation of the shear deformation.