6.2.5 Final Setting of Parameters

The finally extracted data is more or less sensitive to the values of the parameters t0,ref   and ϵ  . For ϵ  a value of 0.3%  is used for the stress case, while for relaxation larger values have to be chosen to account for the instantly beginning relaxation. This issue will be dealt with in Chapter 6.5. As can be seen in Fig. 6.7 a t
 0,ref   slightly after the first value should be selected to both eliminate the influence of the first noisy points and delay time. Hence, t0,ref = 2μs  appears a reasonable compromise.