R curves for energy dissipative materials

摘要: This paper focuses on the theoretical simulation of fracture and stable crack growth specimens with non-local damage. The first law thermodynamics allows identification or definition appropriate crack-driving forces. results are compared recent ideas defining tearing resistance for uncontained yield through energy dissipation rate. A hypothesis regarding conversion mechanical into thermal energies within damage region is formulated to model behaviour dissipative materials rising characteristics. material's capacity develop assumed decrease actual level. relates linearly remaining resources material in dissipating energy. hypothesis, which proposes a square root function J-R curves, verified by regression analysis experimental data European round-robin test different steels.