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Standards for Reliability Testing of Heavy Vehicle



S Jahanmir, James F. Kelly, William E. Luecke


The objective of this project is to develop international standard test methods for assessing the reliability of ceramic components used in diesel engines and other heavy vehicle propulsion systems. Advanced ceramics such as silicon nitrides offer unique combination of properties that include light-weight, high-temperature strength, and resistance to wear and corrosion. These properties make them particularly attractive for diesel engines where their use as key enginecomponents will allow the higher operating temperatures that lead to higher thermal efficiencies and environmentally cleaner propulsion systems. Reliability and cost-effectiveness are critical issues in implementing ceramics in the valve train of diesel engines. Ceramic valve train components are subjected to demanding conditions that include high contact loading, elevatedtemperatures, and corrosive environments. To ensure a reliable service life, standard test methods are needed to evaluate the performance of potential ceramics in highly loaded rolling and sliding contacts. This project will develop test methods for evaluating the contact damage behavior of ceramics under rolling and sliding conditions that simulate the cam roller followers,valves and valve seats. In support of this goal we will pursue four research thrusts. We will evaluate the effect of machining damage on contact reliability as well as the interactions between machining and contact damage that may lead to premature failure. The project will also consider fundamental issues in the relation between ceramic microstructure and performance reliability.Finally, we will investigate the basic mechanisms that lead to formation and propagation of contact damage and the effect on reliability of residual stresses developed during machining and by contact.
Standards for Reliability Testing of Heavy Vehicle


Heavy vehicle propulsion materials


Jahanmir, S. , Kelly, J. and Luecke, W. (2001), Standards for Reliability Testing of Heavy Vehicle, Standards for Reliability Testing of Heavy Vehicle (Accessed May 26, 2024)


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Created October 1, 2001, Updated February 19, 2017