Measurement Of Residual Stresses Of Dh32 Steel On Different Welding Joints By Using Strain Gauges And Fea Volume 4 - Issue 3

Sai Harsha S*, Chandra Sekhara Rao PV

• Rajiv Gandhi university of Knowledge Technologies, Basar, Telangana, India

Received:August 20, 2021;   Published: August 27, 2021

*Corresponding author:Janis Blahins, National Science Platform Platform FOTONIKA-LV, The Institute of Atomic Physics and Spectroscopy at the University of Latvia, Europe

DOI: 10.32474/MAMS.2021.04.000193

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Abstract

Residual stresses are those stresses that remain in an object (in particular, in a welded component) even in the absence of external loading or thermal gradients. In some cases. residual stresses result in significant plastic deformation, leading to warping and distortion of an object. In others, they affect susceptibility to fracture and fatigue. Welding is considered a highly complex metallurgic process that results in irregular geometries, material inadequacies/flaws and tensile residual stresses. High tensile residual stresses and stress concentrations resulting from the weld process have a significant impact on fatigue life of structures, and thus a topic of great concern product design. This paper investigates the prediction of residual stresses developed in shielded metal arc welding of high thickness DH32 (ASTM A131) steel plates through Finite Element Simulation and experiments. To evaluate the residual stresses in weldment, the conventional strain gauges are used. These stresses are developed on Butt joint and T joint. The geometry of the T joint and butt-welded Low Carbon Steel (ASTM A131) plates was modeled, and the residual stresses simulated using ANSYS V19.2. Element Birth and Death Technique was used in simulation to evaluate the stresses in simulation. These results shows that the residual stresses obtained by prediction from the finite element method are in fair agreement with the experimental results. Based on this, it can be concluded that Finite Element Model can be used to replicate and determine the expected residual stresses that would be generated before an actual welding process is carried out [1-7].

Keywords:Residual stresses; Metallurgical process; DH32 steel; Element birth and death technique; Shielded Metal Arc Welding process

Abstract| Introduction| Experimental and Methodology| Results and Discussion| Conclusion| References|