Brittle fracture: thermodynamic refinement of the Griffith problem

摘要: The purpose of the work is (a) a rigorous formulation brittle fracture problem from thermodynamic point view and (b) widening theory by accounting for not only surface tension, but also line tension crack. A proper Griffith attained introducing generalized Gibbs energy as potential, both 2d 3d cases being included. Thermodynamic introduced new characteristic crack originating changing near tip, which can be certain significance nanocracks. criterion rupture reformulated in context tension. As an example, detailed calculation tensions performed molecular solid with dispersion forces. effect on ultimate strength shown to twice much case compared case.