6.2.2 Initial Measurement as Reference

Unfortunately, the transition from the end of stress to the following recovery is always accompanied by some delay and finite transition times. Effects faster than are not visible in the experiments. The delay of the first measurement point serving as an initial reference is often discussed in literature [15, 40, 30, 109]. Some authors [104, 42, 102] argue to be sufficiently short. However, while a reference time taken at would be the ideal case, the real always depends on the used equipment. Furthermore, different strongly influence the following stress behavior, cf. Fig. 6.6.