TY - JOUR
TI - Investigation of thermal mechanical coupling numerical simulation and theoretical study of k-shaped combined metal seal of downhole flow control valve
AU - Zhang Linfeng
AU - He Dongsheng
AU - Tan Ya
AU - Xu Liangbin
JN - Thermal Science
PY - 2021
VL - 25
IS - 4
SP - 3053
EP - 3061
PT - Article
AB - The K-shaped seal assembly is composed of K-shaped metal seal, high  temperature nickel base alloy (GH4169). Its sealing performance directly  affects the reliability and stability of flow control system. The 2-D  axisymmetric K-shaped metal seal is abstracted as the combination of  interference fit model and cantilever beam model. Considering the influence  of temperature on the seal, based on the 2-D constitutive relation of  elastic medium and heat conduction theory, the theoretical model between  contact stress and self variation of K-shaped metal seal ring is deduced by  using inverse method. Using ABAQUS thermal structure coupling analysis  method, the thermal mechanical coupling finite element model of K-shaped  seal assembly is established. The theoretical analytical solution proposed  in this paper can be used to calculate the approximate solution of contact  stress of radial metal seal under current oilfield conditions, and provides  theoretical support for the numerical calculation of thermal stress of  radial metal seal.