On Fracture Mechanics Testing Technique Based on Compliance of Specimens
Based on compliance testing of a straight-notch compact tensile (SN-CT) or a single edge bending (SEB) specimen, this paper present a formula with increment form to calculate plastic part of J-integral, two formulas for a SN-CT specimen and a SEB specimen to transform crack mouth opening displacement (CMOD) v0 to the crack opening displacement (COD) q along load line, and simplified formulas to estimate crack length a and effective young’s modulus E. Furthermore, the relation between v and q of the SN-CT specimens of 45 steel and SEB specimens of 30Cr steel were investigated. The results show that the formulas to describe the relation between the ratio v/q and the dimensionless crack length a/w of the specimens accord with the testing results better.
H.S. Lee, I.S. Yoon and M.H. Aliabadi
L. X. Cai et al., "On Fracture Mechanics Testing Technique Based on Compliance of Specimens", Key Engineering Materials, Vols. 385-387, pp. 293-296, 2008