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Mechanical Engineering B.Tech Seminar Full Report

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Mechanical Engineering B.Tech Seminar Full Report of 

ADVANCED CERAMICS AS FRICTION MATERIAL IN LUBRICATED CLUTCH SYSTEM

ABSTRACT 

      The trend in development of mobility systems is very much influenced by the need of reducing CO2 emission. For this reason it is important to increase power density and efficiency of vehicles powertrain by improving single powertrain components as well as developing completely new powertrain concepts. Shiftable clutches are influencing the dynamic behavior as well as the energy efficiency of the powertrain due to the complex interaction within the system. Power density is very much influenced by the tribological contact of clutch systems which is very important concerning fulfilling systems functionality. This paper focuses experimental investigations of lubricated clutch systems. New experimental methods to determine the oil flow within the tribological contact are present. Based on these results the potential concerning increasing power density and the methods and tools to support development of tribological systems based on advanced ceramics is discussed.

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Mechanical Engineering B.Tech Seminar Full Report of 

Ground freezing

ABSTRACT

Effective in all soil and ground conditions, artificial ground freezing has proven many times to be a viable and versatile construction alternative for both open excavation support and groundwater control. The technique is cost-effective where complete groundwater cut-off and in-built ground support are required, where the work is deep, occurs in difficult ground conditions, or where access restrictions limit the use of other displacement-type ground improvement techniques. Ground stabilization at great depths also lends itself well to the use of ground freezing. The technique also works well in ground conditions and situations that are sensitive to vibration or settlement with minor ground losses associated with conventional support methods. In some cases, the protection afforded to adjacent buildings by a monolithic, impermeable structural wall is a significant factor favoring the use of ground freezing. Liquid nitrogen ground freezing has been used successfully for emergency situations in disturbed, displaced, and loose ground conditions, where detailed soil delineation cannot practically be performed. This paper demonstrates the viability and versatility of ground freezing for construction purposes through the presentation of various case histories. In addition, given that the current interest in artificial ground freezing is becoming increasingly focused on environmental remediation, this important – and growing – application is discussed in more detail and illustrated with case histories.

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