Longitudinal Buckling Of Slender Pressurised Tubes
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This paper is concerned with Euler buckling of long slender tubes subjected to internal pressure. A small disturbance from its perfectly straight form is imposed to the tube to account for the effect of the non-conservative, follower forces generated by fluid pressure. An equivalent lateral distributed force is derived by considering the geometric changes arising from the flexural deformation of the tube. A new differential equation governing the buckling mode of the tube considered as a column is obtained. This equation includes the inertia term for investigating buckling through the dynamic stability criterion. The theory is applied to several cases of pressurised tubes under various loadings and support conditions. The results show that internal fluid pressure can have a significant load transfer role that may lead to buckling in certain cases but has no apparent effect in others. Keywords: cylindrical tubes, internal fluid pressure, Euler buckling.
cylindrical tubes, internal fluid pressure, Euler buckling.