The stress values at the crack tip in bending reinforced concrete beams are considered. state is analytically determined with an initial and propagating crack. Equations of equilibrium a part beam cut along line compiled. These equations reduced to system two nonlinear algebraic using plane-sections hypothesis. determine zone’s height nominal for length. rest parameters expressed regarding zone...

In the present work, a simple formula for evaluation of stress intensity factor (SIF) convex embedded polygonal cracks has been proposed. This is structured as correction Oore-Burns’ equation and based on accurate three-dimensional FE analysis. Furthermore, precise regular crack given.