Dynamic strength analysis of Al-6061-T6 threaded-pipe connectors under preload and internal pressure

Abstract

Threaded-pipe connectors are commonly employed in jointing pipelines in hydraulic and pneumatic systems. In an effort to avoid catastrophic incidences from the pipeline deteriorating, it is crucial to comprehend physical and mechanical properties on the thread connections. This paper is purportedly focused on the stress-and-strain analyses of the threaded pipe connector made of Al-6061-T6 (1 1 4 PT), the material of construction of aircraft structures and petroleum facilities, under preload and with internal pressure. Under the preloaded junction, both first and last threads in the pipeline connection are at most susceptible. With the internal pressure, the threaded-contact stress becomes more homogeneously distributed. Because of the contact stress, poising on the first few threads under the preloaded stage, being flattened, the last thread bears the highest contact stress. Finally, we execute an empirical experiment to reveal deformation phenomenon for the threaded-pipe connector, whose result corroborates the previous simulation studies.