Rubber-like materials, viscoelastic losses

For rubber-like materials, the viscoelastic losses vary with the strain rate and the temperature. The principle of time-temperature equivalence propose in 1955 by Williams et al (75) allows us to superimpose the experimental curves obtained at different temperatures through the known translation factor ar of the WLF transformation. As a consequence, at fixed geometry, the adherence forces provoking crack extensions at different speeds V can be studied as a function of the reduced parameter ajV. 

---