Experimental and numerical thermo-mechanical analysis of welding in a lined pipe. (April 2018)

• Record Type: Journal Article
• Authors: Obeid, Obeid; Alfano, Giulio; Bahai, Hamid; Jouhara, Hussam
• Is Part Of: Journal of manufacturing processes. Volume 32(2018)
• Page Start: 857
• Page End: 872
• Publication Date: 2018-04
• Subjects: Lined pipe -- Weld overlay -- Girth welding -- Thermal history -- Strain -- Residual stress; Production management -- Data processing -- Periodicals; Manufacturing processes -- Periodicals; Procestechnologie; Productietechniek; Production -- Gestion -- Informatique -- Périodiques; Fabrication -- Périodiques; Manufacturing processes; Production management -- Data processing; Periodicals; 670.5
• DOI: 10.1016/j.jmapro.2018.04.009
• Languages: English
• ISSNs: 1526-6125

Abstract

Graphical abstract: Highlights: The temperatures of all points located on the same circumferential line are constant. No difference in strain values happens when the tight fit pipe process is considered. The residual stress profile is characterized as three sections three regions. There is no influence of the pre-heat treatment on residual stresses at FZ and HAZ. Abstract: Experimental tests of multi-pass lined pipe welding are reported and a computational procedure for the determination of the history of temperature, strains and residual stresses is presented in this paper and validated against the experimental test results. The effect of the manufacturing process of the lined pipe on the thermo-mechanical analysis has been investigated. A 3-D FE model using ABAQUS has been developed to simulate a circumferential single-pass weld overlay (lap-weld) and two-pass girth welding (butt-weld). Thermal history and strain fields have been recorded during welding using thermocouples and high temperature strain gauges, respectively. Residual stresses have been measured using residual stress gauges, deep-hole drilling technique and the X-ray diffraction technique along the outer and inner surfaces of the lined pipe. The welding test has been repeated twice to assess the accuracy of thermal and mechanical measurements. Overall, very good correlation has been observed between the experimental and numerical results.