A Study on Fracture Toughness of Advanced Structural Composites

摘要: Abstract : The basic concept of structural fracture in homogeneous, isotropic materials is discussed. Fundamental relationships associated with the linear elastic mechanics, based on Griffith Irwin approach, are presented. Discussed next properties fiber reinforced (or filamentary) composite from mechanics point view. Representative test results then reviewed and analyzed. Involved tests numerous composites such as beryllium/aluminum, glass/epoxy, Scotchply, boron/aluminum, graphite/polyimide, etc. Some these nonhomogeneous anisotropic unidirectionally reinforced, while other angle plied. Finally, phenomenon process filamentary discussed details. It found that applicable to most which have been investigated. nevertheless premature risky predict applicability theory general. Also made this report recommendations for future work intended high performance flight vehicles.