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Full-Text Articles in Mechanical Engineering
Modeling The Residual Useful Life Of Railroad Bearing Grease, Thania Alejandra Martinez
Modeling The Residual Useful Life Of Railroad Bearing Grease, Thania Alejandra Martinez
Theses and Dissertations
Railroad bearing performance is often constrained by the life of its lubricant. The lubricant life is determined by tribomechanical processes that are present during bearing operation. No known physical models exist to predict the railroad bearing lubricant life. This thesis summarizes the efforts undertaken in the development of empirical models that can accurately predict the residual useful life of railroad bearing grease. Modeling techniques to be employed include regression, regression trees, and split plots. The grease samples used to populate this model come from healthy and faulty bearings that were run under different loads, speeds, and ambient conditions in a …
Numerical And Experimental Investigation Of Transport Processes In Biological Systems, Yimeng He
Numerical And Experimental Investigation Of Transport Processes In Biological Systems, Yimeng He
LSU Master's Theses
This thesis focuses on optimization techniques for transport process during the cryopreservation of biological systems. In the first part of this thesis, a well established shape independent Differential Scanning Calorimeter (DSC) technique was used to measure the dehydration response during freezing of Pacific oyster sperm cells. Volumetric shrinkage during freezing of diploid and tetraploid pacific oyster sperm cell suspensions was obtained at cooling rates of 5 and 20 ˚C/min in the presence of extracellular ice and CPAs. By fitting a model of water transport to the experimentally obtained volumetric shrinkage data the best fit membrane permeability parameters (Lpg and …