| Abstract: | Theoretical-Numerical Investigations of Experiments with Creep Crack Growth Numerical results are presented to calculate the C* -integral that is path independent only in the long-time range. The crack tip modelling – elastic or elastic-plastic – is of minor influence on C* – whereas values of C* depend strongly on the material constants describing the creep law. The agreement between numerically and experimentally determined C* data is rather satisfactory in the secondary creep regime. A line integral R* is proposed that is path independent in the whole time domain. |
