Behaviour of ring-stiffened cylindrical members damaged by local denting

Axially pre-loaded steel tubes subjected to lateral impacts (a numerical simulation)

“…They are commonly encountered with different types of imperfections and could very often become subject to various types of damage, denting and impact. A significant amount of work has already been carried out to evaluate the residual strength of dented and impacted steel tubular members using experimental testing [1][2][3][4] or numerical [5,6] approaches. Some of the many publications on the lateral impact of pipelines and tubular members through experimental, theoretical and numerical works have been listed in Zeinoddini et al [7,8,15].…”

On the resistance of steel ring-stiffened cylinders subjected to low-velocity mass impact

“…19. The impact response is similar to the response of unstiffened cylinders [12] and quasi-statically dented ring-stiffened cylinder models [13]. When the indentation increases, the slope of the forcedisplacement curve gradually decreases.…”

“…Walker and Kwok [12] presented experimental and analytical work on quasi-static denting on cylinders. Harding and Onoufriou [13] and Karroum et al [14] conducted quasi-static denting tests on small-scale ring-stiffened cylinder specimens. Walker et al [15,16] reported quasi-static denting tests on both small-scale ring-stiffened and orthogonally stiffened cylinders.…”

A review of structural responses and design of offshore tubular structures subjected to ship impacts

“…Cerik et al (2015) modified the membrane term of the smeared model by Fatt and Wierzbicki (1991) to account for the boundaries of their tests (free to rotate and axially deformable at both ends of ring stiffened columns). The modified formulation predicted the resistance of their results quite well but overestimated the resistance for densely stiffened cylinders when compared with experiments by Harding and Onoufriou (1995). Note that the ring stiffened column models in most of the experiments had short lengths.…”

“…(Cerik et al, 2015;Harding and Onoufriou, 1995;Karroum et al, 2007a, b;Walker et al, 1987Walker et al, , 1988. A few analytical models have been proposed to predict the resistance to structural indentations for ring stiffened columns.…”