Further improvement of the Prometey model and unified curve method part 2. Improvement of the unified curve method

An engineering Unified Curve (UC) method is considered in terms of its advantages and disadvantages for the temperature dependence of fracture toughness KJC(T) to be predicted. Based on the advanced model of brittle fracture (referred as the Prometey-M model) presented in the first part of this paper, the UC method has been improved. This method is referred to as the Advanced Unified Curve (AUC). Relying on a large database on the fracture toughness of materials with various degrees of embrittlement, a comparison was made between AUC and UC as well as AUC and the Master Curve considered as the most widely-used engineering method. AUC, UC and MC were compared using different mathematical statistics methods.