Effect of size and orientation of a centrally located dent on the ultimate strength of a thin square steel plate under axial compression

Fatigue life prediction of 2524‐T3 and 7075‐T62 thin‐sheet aluminium alloy with an initial impact dent under block spectrum loading

“…14,16 Circular dents (i.e., hemispherical or conical dents) with the same diameter usually have similar effects on the static strength of metallic sheets, 13 whereas in terms of non-circular dents, a transverse (to the loading direction) dent always reduces the static strength more dramatically than a longitudinal dent of the same size. 15,17 It is also found that a LVI on an unloaded edge 13 or stiffener site 11 can decrease the ultimate strength by 20% to 25%. The increase in sheet thickness magnifies the effect of dent parameters on the static strength of sheets; that is, for impacted sheets with the same dent size and orientation, the reduction rate of ultimate strength increases with increasing sheet thickness.…”

“…It can be inferred that the residual compressive strength of post‐impacted sheets is around 60% to 90% of the ultimate strength 14,16 . Circular dents (i.e., hemispherical or conical dents) with the same diameter usually have similar effects on the static strength of metallic sheets, 13 whereas in terms of non‐circular dents, a transverse (to the loading direction) dent always reduces the static strength more dramatically than a longitudinal dent of the same size 15,17 . It is also found that a LVI on an unloaded edge 13 or stiffener site 11 can decrease the ultimate strength by 20% to 25%.…”

“…A substantial amount of research exists dealing with the effects of impact dents on the static behavior of metallic sheets. The effects of the dent parameters (e.g., shape, [11][12][13] size, [13][14][15][16][17] and location, 11,13 ) and sheet thickness 17,18 on the compressive strength of postimpacted sheets have been investigated. It can be inferred that the residual compressive strength of post-impacted sheets is around 60% to 90% of the ultimate strength.…”

Buckling assessment of dented truncated cones under external pressure

“…A significant threat to the structural integrity of thin-walled structures during the service life is mechanical damages caused by physical contacts. In recent years, Prabu and his co-authors have published a few papers on the effect of dent imperfections on different structures (Prabu et al 2007, Raviprakash et al 2012, Rathinam and Prabu 2013. The first author and his collaborators also published a significant body of experimental works in this regards which can be found in Refs.…”