November 2009

Functional parameters modelling of transformer

  This paper analyses transformer loss of life, attending to the realistic variability of both structural and functional parameters. The article begins with the modelling of load and ambient temperature profiles by means of chronological series theory. A simple additive model is proposed and validated with realistic data. Loss of life resulting from probabilistic functional and structural parameters is analysed...

Author(s):   Marius-Constantin Popescu and Cristinel Popescu    

September 2009

Study of roller burnishing process on En-8 specimens using design of experiments

  Roller burnishing process is a superior cold forming finishing process. It is done on machine or ground surfaces for both external and internal surfaces. In this process, a smooth, hard object (under considerable pressure) rubs over the minute surface irregularities that are produced during machining or shearing. The hardened rolls of the tool press against the surface and deform the protrusions to a more...

Author(s):   C. S. Jawalkar and R. S. Walia