Transient Failure Analysis of Alloy Steel Welded Joints under Sudden Tension Load Condition

<div>The study aims to evaluate the transient failure behavior of welding joints that are exposed to sudden tensile loading. The Mohr–Coulomb criterion’s fundamental theories are examined and evaluated. The failure function of Mohr’s envelope is first expanded into a polynomial in terms of the stress components (<i>σ<sub>p</sub> </i>, <i>τ<sub>xy</sub> </i>) on the failure region up to the third order. Using ANSYS software, the transient failure response of welding joints was simulated. The Runge–Kutta fourth-order computational technique was employed to perform numerical analysis on transient failure response. Python software is used to develop a computer code for the time-dependent failure response of welding joints. The welded joint specimen is tested with the help of a UTM machine. The analytical results are compared with experimental results. A fractography study was carried out on the welded joint of the failure surface. In this context, the main focus is on SEM and EDS methods to determine the exact type of failure surface and the chemical composition at the surface. The failure analysis of welded structures was carried out through a parametric study. The Mohr–Coulomb criterion is being used in the development of a mathematical model for friction-welded joints subjected to tensile loading. A good agreement was observed when the numerical models’ results were compared to the available literature.</div>