To study the distribution law of circumferential residual stress after casing expansion, using finite element explicit dynamic analysis method analyzed expansion process expandable casings under different rates. The obtained key technical parameters stress, average and elastic recovery along wall thickness direction expansion. It is recognized that maximum tensile locates in middle part directi...

Abstract In this work, cast steel G17CrMoV5-10 was investigated. The material subject to investigation as part of study is commonly used manufacture steam turbine casings. Modern turbines operate under elevated temperature and complex oscillated loads. Thus, the focus investigate behavior during low cycle fatigue (LCF) test performance at 500°C with without hold time in tension. During all type...

A mathematical model has been developed to predict the temperature distribution in wellbores either offshore or inshore. It is incorporated the different activities encountered during drilling operations. Furthermore, the effect of drill collar and casings and bit rotating in a well during completion has been considered. The two dimensional approach is presented in the form of a computer progra...

The cold war has ended with the breakup of the Soviet Union. Arms reduction treaties mandate the destruction of a sizable portion of the worlds destructive potential while environmental concerns greatly reduce the methods that are available for treaty compliance, but the stockpiles of outlawed and obsolete warheads and delivery systems continue to be vast worldwide. In 1982 the University of Mi...

The U.S. Army has an interest in the use of alloys that produce excessive heat during formation and can be used for structural purposes such as shell casings. Molecular dynamics simulations have been used to provide a more thorough understanding of one of these alloys systems, namely the kinetic reaction of Ni and Al nanoparticles. We have considered the affect of primary particle size on sinte...