In the present paper, a micro-mechanical model based on energetic considerations is developed to simulate the effect of the environmental temperature on the fracture toughness of metallic alloys. By considering a homogenization procedure, the stress-strain field and the corresponding strain energy in the material due to a temperature variation can be determined. A generalization of the fracture mechanics energy balance by including the temperature effects is discussed. The proposed micro-mechanical model is governed by few parameters which can be simply estimated, and allows to determine the fracture toughness for any temperature below the room temperature. Such a model, applied to metallic alloys, seems to be able to correctly predict the fracture behavior at low temperatures.
A micromechanical model for the prediction of the temperature fracture behavior dependence in metallic alloys / CARPINTERI, Andrea; BRIGHENTI, Roberto; VANTADORI, Sabrina; DANILO VIAPPIANI. - (2007), pp. 1-6. (Intervento presentato al convegno 5th International Conference on Materials Structure & Micromechanics of Fracture (MSMF-5) tenutosi a Brno (Czech Republic) nel 27-29 June 2007).