“…These include stress intensity factor K [2][3][4][5], the creep fracture mechanics parameter C* (and the C(t), C t , and Q* variants of this parameter) [6][7][8][9][10][11], the reference stress σ ref acting on the remaining ligament of a cracked structure [12][13] and a local crack tip opening displacement rate Ý [14][15]. Typically when these parameters have been applied to describe creep crack growth data on particular materials, cracking rate where A, D o , H, m, φ and p are material constants which may be temperature and stress state dependent.…”