%0 conference lecture
%@ 
%A Keller, S.,Horstmann, M.,Kashaev, N.,Klusemann, B.

%D 2019
%J VI International Conference on Computational Modeling of Fracture and Failure of Materials and Structures
%N 
%P  

%T Prediction of Fatigue Crack Growth in Laser Shock Peening Induced Residual Stress Fields with Experimental Validation
%U 
 
%X The importance of high residual stresses on fatigue crack propagation (FCP) is well known. The application,of laser shock peening (LSP) makes use of the residual stress effect on FCP by introducing,compressive residual stresses with a high penetration depth in metallic structures. While beneficial compressive,residual stress may result in a retardation, tensile residual stresses may lead to an acceleration,of the fatigue crack propagation and have to be treated with care. As residual stress fields always contain,region with tensile and compressive residual stresses, the question of an optimized residual stress field,aiming on the retardation of fatigue cracks arises. This work investigates the influence of LSP on FCP of,aluminium alloys using C(T)100 specimens. An efficient multi-step simulation to predict FCP in LSPinduced,residual stress fields is demonstrated, where the afford of the high dynamic LSP process,simulation is strongly reduced. The multi-step simulation is validated with a novel ‘experimental,simulation’ by applying predicted stress intensity factors to an untreated specimen experimentally.,Mechanism of the crack acceleration and retardation are investigated and linked to crack closure effects.,Numerically predicted areas of crack closure will be shown and can be found at the crack surfaces of the,experiments.