STUDY ON THE CREEP BEHAVIOUR OF NAPPA UPPER PIG LEATHER.

From viewpoint of creep behavior, the visco-elasticity of nappa upper pig leathers is studied. A series model with three Kelvin models is proposed and has been used to imitate and describe their creep behavior successfully. The Kelvin model is a parallel connection model with a spring model and a dashpot model. The interrelated indexes of the imitation are favorable. It means that the imitation is reliable. [ABSTRACT FROM AUTHOR]