Modelling of residual stresses developed in steel cylinders subjected to surface-layer deposition by welding

作者：Senchenkov Igor K; Zhuk Yaroslav A; Chervinko Olga P; Turyk Eugeniusz

来源：Journal of Engineering Mathematics, 2008, 61(2-4): 271-284.

DOI：10.1007/s10665-007-9209-8

• finite-element method
• growing body
• residual stresses
• structure transformation
• thermoviscoplasticity

A new model for the determination of the residual stress-strain and microstructural state of a cylinder subjected to layer deposition by welding is developed. The growing body of theory and unified the Bodner-Partom viscoplastic theory generalized for the case of coupled thermomechanic processes are involved to describe the mechanical behavior of the material. Continuous cooling transformation (CCT) diagrams are used to account for microstructural transformation. The concept of eigenstrains and temperature state is utilized to satisfy the boundary conditions on the growing surface. A time-stepping procedure and a finite-element technique are used to simulate both the instantaneous and the residual stress-strain and microstructural state of a deposited cylinder. The influence of initial temperature on the residual stress-strain and the structural states of the cylinder deposited by austenitic and martensitic steel layers is investigated. It is discovered that martensite and bainite shares in the heat-affected zone can be effectively controlled by the initial temperature of the cylinder. Numerical and experimental results are compared.

• 出版日期2008-8