Validation of numerical method for the measurement residual stress in low carbon steel weldment
1 National Agency for Science and Engineering Infrastructure, Idu Industrial Area Abuja, Nigeria.
2 Defence Industries Corporation of Nigeria, Research and Development Centre, Kakuri, Kaduna, Nigeria.
3 Department of Metallurgical and Materials Engineering, Ahmadu Bello University, Zaria, Nigeria.
† These authors contributed equally to this work.
Research Article
World Journal of Advanced Research and Reviews, 2019, 03(03), 128-142
Publication history:
Received on 13 September 2019; Revised 25 october 2019; accepted on 29 october 2019
Abstract:
Residual stress distributions in the longitudinal and transverse directions on a 10mm thick arc welded mild steel plate was determined by using both experimental and numerical methods. Stress measurements were carried out using X-ray diffractometer and finite element method. Welding simulation procedure was developed using the FE-software ANSYS in order to predict residual stresses. ANSYS 12.0 software was used to model the geometry and simulation carried out to verify the results of the XRD. The results obtained showed that as the welding distance increased, the temperature difference between the experimental and finite element analysis (FEA) increased. It was also observed that sample type and welding direction played a vital role in this research. As the welding speed increased, the induced residual stress decreased because less heat was absorbed by the base material and decreased residence time of the arc. Higher Von Mises stress was also observed in the fusion zone and heat affected zone region which experienced plastic deformation. The FEM residual stress predictions show good agreement with the residual stress obtained from XRD analysis.
Keywords:
Residual stress; Welding; Finite element methods; FEM
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