Numerical investigations of collision experiments considering weld joints

Emerging Challenges for Numerical Simulations of Quasi-Static Collision Experiments on Laser-Welded Thin-Walled Steel Structures

“…Therefore, these tests include uncertainty on the details of the event as different effects evolve at different temporal and spatial scales. For instance, as shown for example by Ehlers et al (2012), Werner et al (2014Werner et al ( , 2015, Wadley et al (2013), and Jones (2013), the welds can fail in collision experiments, and this weld failure has significant effect on load-carrying capacity. However, often after the experiment the detail of failure process and time of weld failure remains uncertain.…”

“…The challenge of these models is the integration of the constitutive law during non-linear collisions event than defines the relation between displacements and the stress resultants (see Figure 1A). The most commonly used models are based on the 3D geometry of the structure made from shell and weld elements (Ehlers et al 2012;Werner et al (2014Werner et al ( , 2015) and in some cases the computationally intensive but very accurate models made from solid elements on component level (see Figure 1A). For thin-walled structures, the shell elements are most common as they assume certain throughthickness behavior in terms of displacement and strains and use the non-linear constitutive expressions to compute the stresses and stress resultants (e.g., Woelke et al 2013;Costas et al, 2019).…”