CREEP COMPLIANCE OF VISCOELASTIC MATERIALS AT CONSTANT TEPERATURE
Keywords:creep is less than recovery
Experiments were carried out to investigate the separate roles of the hydrostatic and deviatoric components of stress tensor (using the first and the second invariant and The results were expressed in term of stress dependent shear compliance in the time temperature region of the tests (up to seconds at of the Relaxation).
was found to increase in magnitude with increasing both hydrostatic and deviatoric components of stress. caused a shift in the magnitude of and caused an increase in with time. The difference between the shear compliance in creep and recovery was found to decrease with and increase with .
All the different effects mentioned above could be rationalized by the idea of the time dependent free volume. If the free volume increases with time by increasing this could explain the difference in the effect of and on and explain why creep is less than recovery
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