Aircraft Design Material-Selection Method Based on MAUT Theory

Multiple attribute decision making(MADM) theory and its application in engineering materials selection are introduced,with basic application processes summarized.Then to serve the materials selection in metal airframe design,an aircraft-design material-selection method based on multi-attribute utility(MAUT) theory is proposed.A material-performance evaluation-index system for primary structures material selection is proposed so as to meet material performance requirements under different airframe design principles,and key points in using MAUT-based material selection methods are also put forward.Its effectiveness is demonstrated by the wing-spar material-selection case of a fighter.