Abstract
The shear deformation property of two-bar tricot fabrics is analyzed, and the theory for calculating this property is dereloped by using a structural model. A unit structure of the model is constructed of three arcs of front-bar yarn and three arcs of back-bar yarn, and these arcs are stretched under shear deformation. This theory covers the general shear deformation of fabrics, for example, simple shear deformation, shear deformation under biaxial tensile deformation. In this theory, the forces for stretching the fabric; are calculated from the forces required for straightening the arcs, while the frictional effect between yarns is taken into consideration, but the elongation and the compressive properties of yarn are out of consideration. The structure constants required for calcualation can be obtained easily from wale density, course density, fabric weight and yarn count.
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