engleski

Computation of asymmetric tensile loading of woven fabric using sigmoidal approximation of nonlinear tensile response

In a computational analysis of deformational behaviour of textile materials their specific tensile nonlinearity needs to be adequately described. Comparison of fitting accuracy for a selection of possible approximate models indicates that the sigmoidal curve offers an excellent fit for a wide spectrum of woven fabrics. In the asymmetric tensile loading, the tensile force is applied to a rectangular fabric specimen via the rigid crossbar, and the linear distribution of strain results in nonlinear stress distribution, including zero stress in the zone of compressive strain at large load eccentricities. The adopted sigmoidal model of tensile response is incorporated into the static conditions of equilibrium between tensile force and stresses in the fabric. The computed results allow a precise estimate of stress concentration and apparent reduction in strength and stiffness resulting from the eccentricity of load application.

Woven fabric, Asymetric tensile loading, Sigmoidal approximation

nije evidentirano