stress concentration Flow characteristic 1 Flow induced 1 Fluid-structure coupling 1 Hydraulic turbines 1 Induced stress 1 Numerical investigations 1 Pump-turbines 1 Pumped storage power plants 1 Pumps 1 Stress concentration 1 Structural characteristics 1 Structural component 1 Transient process 1 Turbine start-up 1 engineered parts 1 fatigue life 1 fatigue performance 1 flow and structural characteristics 1 fluid–structure coupling 1 plastic deformation 1 pump–turbine 1 surface integrity 1 surface roughness 1 turbine start-up 1