Global sensitivity analysis in welding simulations—What are the material data you really need?

Using Finite Element and Contour Method to Evaluate Residual Stress in Thick Ti-6Al-4V Alloy Welded by Electron Beam Welding

“…For example, concerning Young's modulus, for temperatures higher than melt temperature (1660°C), the considered value must be low enough to ensure that the welding pool cannot transmit significant stresses, but high enough to avoid the ill-conditioning of the stiffness matrix. This small value of Young's modulus is used to avoid convergence issues during the numerical analysis, and it is sufficient to get residual stresses with reasonable accuracy, which is verified in the previous works [18,19]. The temperature-dependent material properties are shown in Fig.…”

Influence of thermo-mechanical material properties of different steel grades on welding residual stresses and angular distortion

“…Canas et al [19] investigated the residual stress distribution in butt welded aluminum plates and observed that temperature dependent thermal properties as well as mechanical properties are irrelevant in the simulations. Asserin et al [20] carried out global sensitivity analysis and found that it is only a few temperature dependent material properties that can significantly influence the final outcome in welding simulations.…”

Latin hypercube sampling with inequality constraints

“…These curves present three randomly selected materials among the 800 created and the bounds of the domain. For the sensitivity analysis process, the Young's modulus is represented by only seven parameters (Asserin et al 2009). However, one should keep in mind that for the mechanical computation, the curve represents truly the considered dependence of this modulus because the algorithm uses intermediate values according to a piecewise linear interpolation.…”