Axial Pressure In Pipe Joint Mechanics Analysis Based On The Elastic-plastic Deformation

This paper researches on a new type of non-welded piping connectiontechnology-axial compressive fit pipe connection technology, which is based on thematerial in the production to achieve the mutual connection and sealing of elasticdeformation under the effect of the interference fit. The formula for the theoreticalfoundation and connection technology category yet walled pipe fittings such models,so this type of pipe joint theoretical derivation formula has a strong theoretical andengineering significance.This article is based on the theoretical basis, first of all, fittings to simplify itsstructure based on preliminary design mechanical model. According to elasticmechanics, mechanics and material mechanics analysis shell thin-walled cylinder andthick cylinder class forces in the form of pipes, the pipes radial stress and radialdisplacement formula. Secondly, elasticity, shell mechanics and mechanics ofmaterials as the theoretical basis for pipe joints mechanics analysis formulas derivedradial displacement in the thick-walled pipe hoop class concentrated force by pipeline,and draw the class preload connection fittings, the connection interference analyticalexpressions. Again, by2-8inch axial pressure analysis simplified the basic structureand connection type pipe joint mechanism to elastic mechanics, mechanics andmaterial mechanics shell as the theoretical basis for pipe joints mechanics analysis,draw the the largest class of pipe joints to withstand pressure and stress seal failure ofanalytical expressions. Finally, the use of ABAQUS finite element software for thecontact process2inch pipe fittings numerical simulation, numerical solution of thetheoretical calculation of stress and strain conditions, compared to the derivation ofthe pipe joint connection according to the time course of the contact, the primary sealring fittings come at good sealing effect.Through these studies showed that elasticity, shell mechanics and materialmechanics mechanical model axial push-fittings for the basic principles andvariational method-Ritz method to derive the axial push-fittings when connectingthrough the numerical amount of interference, preload and can withstand themaximum internal pressure calculation formula and other analytical results contrast with the thin-walled theory has a certain convergence, also in line with ABAQUSfinite element numerical simulation software, which works to meet the actual errorrequirements.