Stress-strain hysteresis

Fig. 8. Stress-strain hysteresis as a function of the number of number, measured in a tensile/compression fatigue test at 150 Hz and 0.13 % strain (SiC/SiC)...

There is a cyclic stress-strain hysteresis with loading and unloading, with zero residual strain at the end of the cycle, which accounts for the superelasticity. 

Figure 6. Stress strain hysteresis of conventional silica and POSS filled PDMS composites.

Fig. 11. Stress-strain hysteresis for poly(ether ester) B. Initial sample length 25 mm, strain rate 1 mm/s, 25 °C. For each cycle a new sample was used. Rate of extrusion 0.4 mm /s, nominal draw ratio 4, extrusion tem[ rature 110 °C (for sam description see TaMe 4) ...

Typical stress-strain hysteresis loop. (After Idriss, I.M. et al., /. Geotech. Eng. Div., 104,1427-144 1978. Reprinted with permission of ASCE.)... 

Fig. 3. Stress (a) and energy of elastic deformation (b) versus strain for Si4, Si5, and Si 10 (c) Stress-strain hysteresis.

Fig. 10 Output data from the nonresonance forced vibration method. (A) Relationship between sinusoidal force and deformation for a viscoelastic body. (B) Dynamic stress-strain hysteresis loop for a viscoelastic body.

FIG. 19-1. Stress-strain hysteresis loop for uniaxial extension at constant strain rate R with reversal of direction at upper right, for cross-linked natural rubber at two temperatures as shown or/X is the engineering stress. After Harwood and Schallamach. Reproduced, by permission, from the Journal of Applied Polymer Science. 

Stress-strain curves also exhibited a change from soft rubbery behavior to hard plastic-like behavior as temperature decreased. Stress-strain hysteresis was observed, and distinct yield points were noted for these polycomplex samples. Furthermore, complexation reformed after certain rest periods [89,90]. 

---