Methodology for evaluating weight savings from basic material properties

摘要: Major payoffs of new aerospace structures in terms weight savings, performance, and life-cycle cost are anticipated from successful development advanced materials. To aid alloy systems a methodhas been developed for predicting savings resulting material (property set) improvements specific failure modes aircraft structures. Material properties include density, modulus elasticity, strength, fatigue, crack growth, fracture toughness, stress corrosion resistance. Weight analysis includes consideration the margins safety various that could affect size structure. Results applicable to carrier-based patrol an tactical fighter indicate potential up 16 percent aluminum alloys.