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Hysteresis Heating Of Railroad Bearing Thermoplastic Elastomer Suspension Element, Oscar O. Rodriguez, Arturo A. Fuentes, Constantine Tarawneh, Robert E. Jones
Hysteresis Heating Of Railroad Bearing Thermoplastic Elastomer Suspension Element, Oscar O. Rodriguez, Arturo A. Fuentes, Constantine Tarawneh, Robert E. Jones
Mechanical Engineering Faculty Publications and Presentations
Thermoplastic elastomers (TPE’s) are increasingly being used in rail service in load damping applications. They are superior to traditional elastomers primarily in their ease of fabrication. Like traditional elastomers they offer benefits including reduction in noise emissions and improved wear resistance in metal components that are in contact with such parts in the railcar suspension system. However, viscoelastic materials, such as the railroad bearing thermoplastic elastomer suspension element (or elastomeric pad), are known to develop self-heating (hysteresis) under cyclic loading, which can lead to undesirable consequences. Quantifying the hysteresis heating of the pad during operation is therefore essential to predict …
Development Of Prognostic Techniques For Surface Defect Growth In Railroad Bearing Rolling Elements, Nancy De Los Santos, Robert Jones, Constantine Tarawneh, Arturo A. Fuentes, Anthony Villarreal
Development Of Prognostic Techniques For Surface Defect Growth In Railroad Bearing Rolling Elements, Nancy De Los Santos, Robert Jones, Constantine Tarawneh, Arturo A. Fuentes, Anthony Villarreal
Mechanical Engineering Faculty Publications and Presentations
Prevention of bearing failures which may lead to catastrophic derailment is a major safety concern for the railroad industry. Advances in bearing condition monitoring hold the promise of early detection of bearing defects, which will improve system reliability by permitting early replacement of failing components. However, to minimize disruption to operations while providing the maximum level of accident prevention that early detection affords, it will be necessary to understand the defect growth process and try to quantify the growth speed to permit economical, non-disruptive replacement of failing components rather than relying on immediate removal upon detection. The study presented here …
Social Media Sites Use Intensity And Job Burnout Among The U.S. And Thai Employees, Peerayuth Charoensukmongkol, Murad Moqbel, Sandra Gutierrez-Wirsching
Social Media Sites Use Intensity And Job Burnout Among The U.S. And Thai Employees, Peerayuth Charoensukmongkol, Murad Moqbel, Sandra Gutierrez-Wirsching
Information Systems Faculty Publications and Presentations
This research explored the effect of social network sites (SNS) use intensity in the workplace on three aspects of job burnout. The data were collected from non-teaching employees from universities in the U.S. (N = 174) and in Thailand (N = 182). Results from partial least squares regression revealed some evidence of the u-curve relationship between SNS use intensity and depersonalization in both countries. However, the u-curve relationship between SNS use and lack of personal accomplishment is only supported in U.S. samples. This suggests that while a moderate degree of SNS use at work tends to lower burnout, a high …