Performance Limits for Stiffness-Critical Graphitic Foam Structures. Part I: Comparisons with High-Modulus Foams, Refractory Alloys and Graphite-Epoxy Composites:

摘要: Graphitic foams offer exciting potential for mass savings in structures. The present investigation seeks to identify the and corresponding dimensional tradeoffs application of such materials simple, stiffness-critical structural elements, support an in-house development program. A hypothetical family graphitic having ligament stiffness properties identical those P120 graphite fiber is considered; are viewed as realistic upper bounds performance this class materials. representative refractory alloy, AS4/3501-6 unidirectional [0/90], composites, commercially available SiC amorphous carbon compared plates bending buckling, beams tension bars, analogy Gordon [1] Ashby [2,3]. thickness ratios comparison chosen applications dep...