Advanced elasto-plastic response analysis model for piping systems with tees

Abstract

Finite element analyses were conducted to improve the elasto-plastic response analysis of piping systems with tees, taking into account the actual geometry and material properties, and comparing the results with the design analysis. The tee geometry was converted from point cloud data to CAD data and applied to vibration mode analysis and elasto-plastic response analysis. Values obtained from tensile test specimens cut from actual tee pipes were used to consider the effect on mechanical properties during forming. In piping systems where the tee section is the damaged location, the stiffness of the tee section has a significant effect on the modal deformation, and it was confirmed that the tee section with small elongation requires appropriate damage evaluation.