engleski

A Rheological Model of Fabric Elongation According to Lethersich

Under tensile loading, tearing of fabric or unwanted viscoelastic or plastic deformations occur. In order to avoid the appearance of plastic deformations in the fabric, it is necessary to know in advance which tensile force will cause such deformations. An appropriate rheological model that describes the behaviour of fabric, depending on its geometrical and structural parameters under tensile stress, curve (F-ε), should be set. For the purpose of testing the rheological properties of fabric, various types of raw cotton fabrics have been deposited in the twill weave with same warp density and different weft densities. The samples were made on the OMNIplus 800 tt air-jet loom machine Picanol. Based on the experimental results obtained to stretch the fabric samples, a rheological Lethersich’s model was introduced. Appropriate differential equations for the tested sample patterns were made and resolved, resulting in the dependence between tensile force and relative strain. The rheological model according to Lethersich describes well the process of elongation of cotton woven fabric in twill weave under static test conditions.

Rheology, Cotton woven fabric, Twill weave, Lethersich’s model, Differential equations of elongation

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