Life-cycle engineering is the integration of the design process, which addresses primarily the system's performance, wi th analysis of the design's other attributes, including reliability, maintainability, lifecycle cost, and manufacturability. The advent of symbolic approaches to design integration reveals the requirement and opportunity of using higher-level analysis to select the opt imum de...

most of the materials used in the industry of aero-engine components generally consist of titaniumalloys. advanced materials, because of their excellent combination of high specific strength, lightweight and general corrosion resistance. in fact, chemical wear resistance of aero-engine alloyprovides a serious challenge for cutting tool material during the machining process. the reductionin cutt...