Fatigue Evaluation of Composite-reinforced, Integrally Stiffened Metal Panels: Summary |
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AF-126 adhesive all-metal panel allow aluminum aluminum-glass assuming the metal calculated compared composite material Composite-Reinforced Panel condition considerable consisted crack growth crack growth rates CRACK LENGTH 2a curves cycles to failure DENSITY design criteria design limit load determine effects elevated-temperature-cure adhesive equal fabricated face sheet fail-safe fail-safe behavior failed fatigue coupons Fatigue Crack fatigue loading fatigue tests Figure given graphite graphite-reinforced coupons graphite/epoxy gross Hole Inches indicate inner integrally formed INTEGRALLY STIFFENED METAL integrally-formed panel integrally-stiffened metal panel less mass maximum measure METAL CRACKED METAL FAILURE METAL STRESS meter Millimeters MN/m² MODULUS number of cycles panel concept plies presented rate of crack reference reinforcement Report residual strength Respectively S-Glass shown in Figure static STIFFENED METAL PANELS stiffness ratio stress levels structure System of Units Table tension U. S. Customary Units weight