Carrying Capacity Finite Element Analysis Of Piping Branch Junctions Based On Effect Of Enhanced Plasticity

The structure of piping branch junctions, which is a main component of the pipes used in petrochemical grade nuclear power industry, is common in Bearing device. Recently, the plastic limit analysis of piping branch junctions structure has been widely studied. The ideal plastic constitutive model is used in the theoretical analysis and numerical simulation, but the structure for Piping Branch Junctions considering the ultimate strength based on effect of enhanced plasticity has not yet studied. The potential of pipe materials has been underrated. The effect of enhanced plasticity as the result of gross plastic deformation in process of using is considered in this paper. The defect-free plastic limit load of Piping Branch Junctions structures is analyzed. ANSYS commercial finite element software is used to conduct detailed numerical simulation. Nodes based on the maximum strain intensity, extracted under different load sub-step strain intensity, strain intensity and make the appropriate node load - strain intensity curve. From an engineering point of view of using our design standards and ASME specification guidelines recommended by the slope of twice-elastic-slope method to determine the value of limit load. Discuss the effect of enhanced plasticity on the piping branch junctions of plastic limit load and failure mode of the law, and further validation of the structure. Main contents and conclusions are as follows:1. Established orthogonal Diameter piping branch junctions, different diameter ratio orthogonal thickness three links, different diameter ratio orthogonal equal strength piping branch junctions ,diameter skew piping branch junctions ideal elastoplastic and plasticity enhanced dimensional finite element model and including pressure reach its yield limit process, track their loading history, different load step under Mises stress distribution.2. Orthogonal diameter established links with local thinned area, the ideal bias thinning plastic piping branch junctions, plastic limit internal pressure strength database, analysis of the thickness of its thinnest thinning area, circumferential length, the length of the limit load axis impact.By comparing the analysis of the effect of enhanced plasticity of the three links in the ideal elastic than the plastic limit pressure on the piping branch junctions under the load increased significantly. This increase material utilization, improving structural design and safety assessment of links provides a theoretical basis and numerical reference.