Topic
Vibration fatigue
About: Vibration fatigue is a research topic. Over the lifetime, 3460 publications have been published within this topic receiving 46297 citations.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this paper, a non-local damage parameter was successfully applied to fatigue life assessment of the smooth specimens subjected to variable amplitude bending, which is based on averaging the stresses over the critical plane in the material using weight function in the exponential form.
16 citations
TL;DR: In this article, a new continuum damage mechanics (CDM) model was established to analyze creep-fatigue life, where the damage increment nonlinear summation rule was proposed and the frequency modification was made on the fatigue damage evolution equation.
Abstract: Low-cycle fatigue tests at different frequencies and creep tests under different stress levels of Plexiglas Resist 45 were conducted. Correspondingly, the creep fracture time, S-N curves, cyclic creep, and hysteresis loop were obtained. These results showed that the fatigue life increases with frequency at low frequency domain. After analysis, it was found that fatigue life is dependent on the load rate and is affected by the creep damage. In addition, a new continuum damage mechanics (CDM) model was established to analyze creep-fatigue life, where the damage increment nonlinear summation rule was proposed and the frequency modification was made on the fatigue damage evolution equation. Differential evolution (DE) algorithm was employed to determine the parameters within the model. The proposed model described fatigue life under different frequencies, and the calculated results agreed well with the experimental results.
16 citations
TL;DR: In this paper, a stochastic traffic load model is used to evaluate the fatigue reliability of orthotropic steel bridge decks, and a response surface method is presented to solve the timeconsuming problem caused by hotspot stress simulations in the finite element model.
Abstract: A steady traffic growth has posed a threat to the fatigue safety of existing bridges. Uncertainties in traffic flows add to the challenge of an accurate fatigue safety assessment. This article utilizes a stochastic traffic load model to evaluate the fatigue reliability of orthotropic steel bridge decks. The traffic load model is simulated by site-specific weigh-in-motion measurements. A response surface method is presented to solve the time-consuming problem caused by hotspot stress simulations in the finite element model. Applications of the stochastic traffic load model for probabilistic modeling and fatigue reliability assessment are demonstrated in the case study of a steel box-girder bridge. Numerical results indicate that the growth rate of the gross vehicle weight leads to a rapid decrease of the fatigue reliability in comparison to the traffic volume growth. Even though the traffic volume growth is rapid, the control of overloaded trucks in comparison to the traffic volume is an effective way to ensure the fatigue safety of the steel bridges.
16 citations
TL;DR: In this paper, a two-parameter nominal stress approach was proposed to calculate the fatigue damage of each load cycle considering the effect of stress amplitude and mean simultaneously. But the accuracy of fatigue life prediction was not improved.
16 citations
DOI•
01 Dec 2005
TL;DR: An original frequency method for fatigue life estimation of mechanical components subjected to random inputs and it belongs to the class of corrective coefficient to narrow-band formula methods and it has been thought for bimodal PSDs.
Abstract: This paper describes an original frequency method for fatigue life estimation of mechanical components subjected to random inputs. Currently mechanical components life design under random loads is an important task of the research, due to the increasing importance of virtual simulation in opposition to the experimental tests. The frequency domain approach, in this context, seems to be able to supply reliable estimations with small computational effort. The proposed method belongs to the class of corrective coefficient to narrow-band formula methods and it has been thought for bimodal PSDs. The definition of the generalized bimodal processes and the research of the links between corrective coefficient and the system dynamic behaviour are other original aspects of this work. keyword: Fatigue life, Frequency domain approach, Bimodal PSD.
16 citations