Stress intensity factor for clamped SENT specimen containing non-straight crack front and side grooves

摘要

Highlights?Evaluate the SIF for SENT specimen containing curved crack front and side grooves.?Validates the 2D SIF for specimens with curved crack fronts and side grooves.?Develop the modification factors to construct the 3D SIF solution for SENT specimen.AbstractThree-dimensional (3D) finite element analyses (FEA) of clamped single-edge notched tension (SENT) specimens are performed to evaluate the stress intensity factor (SIF). Both the average and local SIF values over the crack front are evaluated. Plane-sided (PS) specimens containing both straight and curved crack fronts and side-grooved (SG) specimens containing straight crack fronts are considered including six average crack lengths (i.e.aave/W=0.2–0.7). PS specimens with three thickness-to-width ratios (i.e.B/W=0.5, 1 and 2) are analyzed. The curved crack front is assumed to be bowed symmetrically and characterized by a power-law expres