A Consideration of the Occurrence Condition of Irreversible Fracture of Homogeneous Isotropic Linear Elastic Body by Thermodynamics

Abstract

In this paper， we gave a consideration of Griffith’s theory and fracture of a homogeneous isotropic linear elastic body by thermodynamics． From the results， the condition of fracture occurrence by Griffith’s theory is only applied to reversible fracture and it is not able to be the condition of irreversible fracture． But by the theory which surface formation is the change of constitutive equation of the surface area and the generation of strain energy in the surface area， the fracture above mentioned is irreversible and the condition of fracture occurrence by Griffith’s theory can be applied to irreversible fracture.