Abstract
A model is developed to predict time dependent behavior of polymer tape in a wound roll where the bulk radial modulus, or intrinsic stiffness of the roll in the radial direction, has different time dependent properties than the tape material itself. This work examines the combined effects of viscoelasticity and the evolution of anisotropy and will aid in the development of technology to increase dimensional stability, ensuring that data may be read after long periods of time. The results of this work show that the evolution of anisotropy may amplify or counteract the effects of viscoelasticity in a roll.