An investigation on the circumferential surface crack growth in steel pipes subjected to fatigue bending

Surface Crack Growth in Offshore Metallic Pipes under Cyclic Loads: A Literature Review

“…These steps are then repeated until the crack propagates to a required crack length. As long as it is using proper modelling and analysis methods, the FEM is a reliable and accurate approach for modelling surface cracks in metallic pipes [12,38]. Table 3 lists the numerical studies of surface cracks in pipes.…”

“…Among the literature in regard to the surface crack growth in pipes, experimental studies [12,[20][21][22][23][24][25][26], as an indispensable and important component, have been conducted on surface cracked pipes for the purpose of understanding the mechanism of surface crack growth, calibrating and validating related numerical and analytical evaluation methods. The majority of the studies focused on numerical approaches, mostly by means of the FE method [12,[27][28][29][30][31][32][33][34][35][36][37][38]. Analytical approaches [12,25,30], which are of significant value to guide practitioners in practical situations, are relatively insufficient.…”

“…The majority of the studies focused on numerical approaches, mostly by means of the FE method [12,[27][28][29][30][31][32][33][34][35][36][37][38]. Analytical approaches [12,25,30], which are of significant value to guide practitioners in practical situations, are relatively insufficient. Through Table 1, we summarised the main research interests (e.g., load, crack orientation and dimension, pipe dimension, welding effect, and environmental effect) on the issue of surface crack growth in pipes.…”

Numerical analysis on the SIF of internal surface cracks in steel pipes reinforced with CRS subjected to bending

“…A sensitivity study has been conducted in a previous work to determine the appropriate modelling strategy (e.g. element type, meshing method and size, modelling contours and divisions around crack tip) in order to ensure the accuracy of SIF evaluation (Li et al 2019). Figure 3(a) shows the FE mode and the global meshing condition.…”

“…In marine environment, offshore steel pipes (e.g. rigid risers) bear dynamic loads long-termly generated by wave, current, wind, and 2nd order floater motions (Kim and Kim 2015;Chibueze et al 2016;Li et al 2019). The cyclic bending loads, as one of the dominate load cases, is frequently applied on fatigue critical zones such as hang-off zone, sag bend, arch bend and the touch down zone.…”