摘要
The monitored resonant behavior of fatigue specimens of metastable austenitic stainless steel （AISI304） is correlated with its damage accumulation in the very high cycle fatigue （VHCF） regime. The resonant behavior is stud- ied experimentally and shows a distinct transient characteristic. Microscopic ex- aminations indicate that during VHCF a localized plastic deformation in shear bands arises on the specimen surface. of damage accumulation in shear bands Hence, this work focuses on the effect on the resonant behavior of AISI304 in the VHCF regime. A microstructural simulation model is proposed that takes into account specific mechanisms in shear bands proven by experimental results. The simulation model is solved numerically using the two-dimensional bound- ary element method and the resonant behavior is characterized by evaluating the force-displacement hysteresis loop. Simulation of shear bands agrees well with microscopic examinations and plastic deformation in shear bands influences the transient characteristic of the resonant behavior.
The monitored resonant behavior of fatigue specimens of metastable austenitic stainless steel （AISI304） is correlated with its damage accumulation in the very high cycle fatigue （VHCF） regime. The resonant behavior is stud- ied experimentally and shows a distinct transient characteristic. Microscopic ex- aminations indicate that during VHCF a localized plastic deformation in shear bands arises on the specimen surface. of damage accumulation in shear bands Hence, this work focuses on the effect on the resonant behavior of AISI304 in the VHCF regime. A microstructural simulation model is proposed that takes into account specific mechanisms in shear bands proven by experimental results. The simulation model is solved numerically using the two-dimensional bound- ary element method and the resonant behavior is characterized by evaluating the force-displacement hysteresis loop. Simulation of shear bands agrees well with microscopic examinations and plastic deformation in shear bands influences the transient characteristic of the resonant behavior.
基金
supported by Deutsche Forschungsgemeinschaft(DFG)in the framework of the priority program Life~∞(SPP 1466)
