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No mechanical product will perform reliably unless it is designed specifically for reliability. There are many studies about reliability in mechanical design but most of them focus on the one part of entire reliability problem. The ability to see the bigger picture is essential in the field of mechanical reliability. Reader can gain a holistic viewpoint for the consideration of mechanical reliability by this approach. In this study failure modes, reliability variables, models, measures and methods from mechanical engineering point of view were investigated. From the open literature, published research work was compiled. Search results were classified and evaluated in terms of suitability for mechanical engineering. As an example, the procedure to find the reliability of shaft was investigated in support of our approach. Analysis and documentation of failed mechanical components are essential for preventing designers from repeating the same errors. Therefore, this research is expected to provide an easy way to investigate reliability problems of mechanical components such as shafts. [ABSTRACT FROM AUTHOR]

Considering today's competitive enviroment and the required emission regulations, it becomes increasingly important to reduce fuel consumption and harmful exhaust emissions in order to increase engine output power. This can be obtained by developing a well designed injection system or combustion chamber as well as by decreasing the mechanical losses, which are among the most important parameters affecting engine efficiency. The amount of wear rate and its location in the engine should be known to reduce mechanical losses. Therefore, piston ring-cylinder liner wear, which constitutes the greatest portion of mechanical losses, must be investigated. Researchers have attempted to measure the amount of wear by using various methods. In addition, there are also studies carried out to improve new coating materials or lubricants for reducing wear rate. In this study, these measurement methods are discussed and compared with each other in terms of their advantages and disadvantages. [ABSTRACT FROM AUTHOR]