Determination of notch factors for welded cruciform joints based on numerical analysis and metamodeling

An algorithm for statistical evaluation of weld toe geometries using laser triangulation

“…An alternative way is the use of surrogate models obtained from regression or the application of artificial neural networks (ANN) [24][25][26]38]. The ANN used for our application by Oswald et al is based on 4136 linear elastic FE-simulations of parametrized design samples and has proven high accuracy compared to former existing empirical formulas as well as a significant increase of applicable parameter ranges.…”

“…The ANN used for our application by Oswald et al is based on 4136 linear elastic FE-simulations of parametrized design samples and has proven high accuracy compared to former existing empirical formulas as well as a significant increase of applicable parameter ranges. More information can be found in [24]. However, the evaluation is currently only possible for fillet welds in the as-welded condition (mechanical post-weld treatment is so far excluded).…”

“…Other investigations also show a high influence of the weld leg length [23]. The stress concentration factor represents local stress concentration at the weld toe and can be estimated from weld toe radius and flank angle [24][25][26].…”

“…The considered parameters are the weld radius, weld angle and leg length. With these parameters it is also possible to conduct an evaluation of the stress concentration factor regarding the approach in [24]. In addition to the measuring of the weld toes, a quality assessment according to ISO 5817:2014 [30] is carried out.…”

Determination of notch factors for transverse non-load carrying stiffeners based on numerical analysis and metamodeling

“…Two new surrogate models based on a large amount of samples processed using FEA of transverse non-load carrying stiffeners with varying geometrical parameters of flank angle α, reference radius ρ, sheet thicknesses t 1 , t 2 , and weld seam thickness a are provided. The paper extends an already investigated and published collection of the joint types (a) cruciform joints [14], (b) butt joints [15], and (c) load carrying T-joints [16].…”