Experimental work where thin wall pipe is subjected to axial compressive loading. Evaluates wavelike buckling associated with compressive axial loading.
Follow-on work for axial loading conditions to assess buckling characteristics of prefabricated prestressed pipe segments and to determine the effect of such design variables as support conditions, tolerance, and allowable design stress upon the…
This project address local buckling (or wrinkling) associated with pipe wall instability in the axial direction when subjected to bending or axial compression. It considered the collapse of the cross-section under circumferential compression due to…
This report presents the layout of limit state functions, development of regression equations that define the reduced resistance to local buckling due to corrosion defects, and the calibration of partial safety factors. Examples were included to…
This work focused on the effect of corrosion defects on compressive strain limit state at the incipient of buckling. A total of 10 tests in three series have been carried out on NPS24 grade X70 line pipe.
Numerical studies were carried out for NPS 20 and NPS 30 pipes with three corrosion configuration and varying internal pressures. The pipes under consideration has a yield strength range from 56 to 70 ksi and D/t ratio range from 64 to 91.
This work developed a finite element model to be used in a subsequent parametric study. Ten machined corroded pipes were used in the verification of the models.
In the past 20 years, much research has been conducted into buckling and collapse of pipelines under external pressure, bending or tension and combinations. Also many finite element analyses have been performed into the behavior of pipelines under…