this paper presents a finite element analysis and its related experimental test of corrugated steel web beams subjected to fatigue loading. a particular focus in this study was set on the fatigue failure arising from the web-to-flange welded joint of the corrugated steel web beam. a detailed three-dimensional finite element model which explicitly includes the geometry of the web-to-flange welds...

S *in chronological order Additive Manufacturing in the Context of Structural Integrity Michael Gorelik, Federal Aviation Administration (FAA) Additive Manufacturing (AM) applications are poised to rapidly expand in aviation, driven by a significant number of business and technical benefits that are extensively covered elsewhere. Due to its inherent flexibility, AM is being considered for a var...

In this study, hydrogen-assisted fatigue propagation (a kind of corrosion phenomenon) in corner cracks at holes located plates under tensile loading was studied, the results compared with those obtained for by air. To end, numerical modeling carried out case studied to evaluate advance crack front based on Paris equation and stress intensity factors (SIFs) Raju Newman. The showed that tended to...

A 2-dimensional, elastic-plastic finite element model has been developed to simulate plasticity induced crack closure in slanted and deflected cracks growing outside the small scale yielding (SSY) regime. The finite element model allows for contact between deformable surfaces to capture the complex contact interaction between the crack faces. Coulomb’s friction law has been used to model fricti...

conclusions the study findings highlight the importance of the mental aspect of fatigue in this working group. these results have possible implications for workers’ health and well-being and for the design of shift work systems, for industrial workers. background shift work is a well-recognized occupational health hazard in both industrialized and industrially developing countries. prolonged wo...

A finite element model has been created to quantify the thermal fatigue damage of the CPV die attach. Simulations are used to compare to results of empirical thermal fatigue equations originally developed for accelerated chamber cycling. While the empirical equations show promise when extrapolated to the lower temperature cycles characteristic of weather-induced temperature changes in the CPV d...

ACKNOWLEDGEMENTS This work would not have come to fruition were it not for the assistance and support I received from a great many people. I would like to express my thanks to my advisor, Dr. Richard Neu for providing direction throughout the research process, and for his expertise and helpful advice. I would also like to thank the members of my committee, Dr. David McDowell and Dr. Markus Reit...

background: fatigue is one of the most common symptoms in primary care that adversely affects work, family life, and social relations. the purpose of this study was to survey the relationship between work schedule and fatigue among the emergency personnel of isfahan, iran using the checklist individual strength (cis) standard method in 2010. methods: this cross-sectional study was performed on ...