Stefan Weihe

TL;DR: In this paper, a two-level CPPM iteration scheme is proposed for constitutive relations in elastoplasticity, where hardening variables are fixed during the stress projection onto consequently fixed yield surfaces, and after the stress projections, new values of the hardening parameters are calculated defining new yield surfaces.

TL;DR: In this article, a five-step simulation process chain capable of numerically predicting the SPR joint geometry and the joint strength under different loading conditions such as Shear, Cross-tension and Peel loading is presented.

TL;DR: In this paper, a fatigue evaluation procedure to assess the influence of both multiaxial stress state caused by a traveling crane wheel load and the welding residual stresses on the lifetime of crane runway girders was presented.

TL;DR: An overview on the role of the stress state and stress Triaxiality Factor (TF) in lifetime prediction of solder connections is presented and when including multiaxial effects by modification of damage related variables a better correlation between calculated and experimentally observed crack path is achieved.

TL;DR: In this article, the assessment of crack propagation of crane runway girders being travelled over by wheel loads is addressed, and the number of cycles of crack growth is calculated by using the shear stress intensity factor K τ.