Investigation into the Geometrical Loop Effect on Tensile Behavior of Single Bar Warp-Knitted Fabric Using Finite Element Method

In this study, the finite element modeling with considering the two-dimensional elastica curve is used. then, a twisted shape of elastica iss investigated through applying a pair of equal unbalancing twisted torques to the ends of the elastic rod. in the loop model, the implicit method, nonlinear geometry, elastic properties and three-dimensional beam element are used. implicit method is accurate and a simple method for problems of structural complexity without intervention of time. finally, the proposed model is used as overlap and legs of the warp-knitted single bar fabric structure and uniaxial tensile behavior of the fabric in the low strain is modeled using abaqus software. the explicit method is used in the fabric simulation based on complexity, connection and interaction of the parts in the simulated fabric and the nonlinear geometry, elastic properties and three-dimensional beam element is used in fabric simulation like the loop model. the results of the actual fabric test under low strain with theoretical model are compared. the model results are more consistent with the results of experiments conducted at lower strain on the fabric.