Abstract
The response of viscoelastic materials to uniaxial cyclic stresses at low frequency is analysed theoretically using a Fourier series representation and dynamic compliance calculated from creep data. The theory is applied to sawtooth, square and rectangular wave forms on polymethylmethacrylate and polypropylene. Correlation between theory and experiment is good even when extended into the non-linear region for polypropylene. It is suggested that this approach would require considerably less computation for general cyclic stress forms than an integral superposition method.
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