Nonlinear Maxwell modelling of inverse relaxation in yarns and fabrics

Mandhyan, P K; Nachane, R P; Banerjee, S ; Pawar, B R; Koli, H S

Abstract

An attempt has been made to fit the derived equation on the experimental inverse relaxation curves by employing Levenberg-Marquardt’s method for nonlinear regression and calculation of the constant values involved in the equation.
The relaxation curves can be classified into ordinary relaxation, mixed relaxation and inverse relaxation curves. There seems to be good concurrence between the experimental and the fitted inverse relaxation curves.


Keyword(s)

Cotton; Fabric; Inverse relaxation; Mathematical model; Non-linear regression; Visco-elastic recovery; Yarn



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